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SAKAGAMI Kimihiro
Graduate School of Engineering / Department of Architecture
Professor

Researcher basic information

■ Research Keyword
  • Urban acoustic environment
  • Acoustics Education
  • Acoustical Materials
  • Environmental Acoustics
  • Architectural Environmental Engineering
■ Research Areas
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Construction environment and equipment
■ Committee History
  • 2021 - Present, Acoustics Australia, Editorial Board
  • Jan. 2020 - Present, MDPI, Editorial Board, Urban Science
  • 2019 - Present, MDPI, Editorial Board, Applied Sciences
  • 2011 - Dec. 2021, Elsevier, Applied Acoustics Associate Editor / Editor
  • 2018 - 2021, MDPI, Guest Editor, Sustainability
  • Sep. 2020 - Dec. 2020, Frontier Science Psychology ゲストエディター
  • 2009 - 2011, 日本音響学会, 理事
  • 2009 - 2011, 日本音響学会建築音響研究委員会, 委員長
  • 2007 - 2009, 日本音響学会, 建築音響研究委員会副委員長
  • 日本音響学会, 評議員

Research activity information

■ Award
  • Mar. 2012 日本音響学会, 日本音響学会環境音響研究賞, 次世代吸音材料を用いた吸音構造に関する研究
    SAKAGAMI KIMIHIRO
    Japan society

■ Paper
  • Sanjay Kumar, Kimihiro Sakagami, Heow Pueh Lee
    The pursuit of sustainable design has made strides in improving building practices, yet traditional approaches often fall short in addressing the holistic needs of both the environment and human well-being. This research delves into the emerging field of regenerative design, which extends beyond sustainability by seeking to restore and enhance ecological and human systems. By integrating regenerative principles into indoor environments, this study evaluates their impact on indoor environmental quality (IEQ). Through a comprehensive literature review, the research demonstrates that regenerative design can significantly enhance air quality, thermal comfort, lighting, and acoustics, ultimately creating healthier and more productive indoor spaces. This paper also discusses potential challenges and outlines future research directions to further advance the application of regenerative design in building practices.
    MDPI AG, Mar. 2025, Sustainability, 17(6) (6), 2342 - 2342, English
    [Refereed]
    Scientific journal

  • Kimihiro Sakagami, Kaito Katayama
    Acoustical Society of Japan, Dec. 2024, Acoustical Science and Technology, 46(1) (1), 30 - 33, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, Mar. 2024, Acoustical Science and Technology, 45(2) (2), 57 - 68
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Haruhi Inoue, Takeshi Okuzono
    Demands for natural ventilation is inaugurated recently, particularly after the COVID-19 outbreak. Various ventilating windows have been proposed, one of which a plenum window has been studied for these years. Since the COVID outbreak shops and restaurants often leave doors opened for ventilation reasons during their business hours. However, by this, the indoor sound environment is suffered by incoming noises from streets. Therefore, it is desirable that a sound insulation structure enabling natural ventilation is developed. In this study, we propose a door with plenum structure which is an application of the same principle of plenum windows to a door. Doors and windows are of different sizes, and under different conditions. Therefore, in this paper, as a pilot study, we employed finite element method to analyse the sound insulation characteristics of a plenum door. Results show that a plenum door, although its sound insulation is not very high, shows sound insulation performance to a certain extent. Also, a parametric study is given to show the effect of parameters including that of sound absorption linings.
    Institute of Noise Control Engineering (INCE), Nov. 2023, INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 268(2) (2), 6318 - 6327
    Scientific journal

  • Yohei Tsukamoto, Kaoru Tamai, Kimihiro Sakagami, Takeshi Okuzono
    Since double-glazed glasses have superior thermal insulation performance compared to single-glazed glasses, they are widely employed for windows in recent buildings. However, the double-glazed glasses used in general buildings have mass-air-mass resonance at around 200-400 Hz, and, at those frequencies, their sound reduction indices are often lower than that of single-glazed glasses that have the same weight. In designing an indoor acoustic environment, it is helpful to have a practical method to predict the sound reduction index of a double-glazed glass window, including the resonance. In this study, at first, measured values of actual double-glazed windows are compared with calculated values of the existing sound transmission theories for double plates and applicability of the theories to double-glazed windows are investigated. Next, in order to obtain a practical prediction of the sound reduction indices of double-glazed windows, some measured values of double-glazed windows are collected from a manufacturer's database and the characteristics of the sound reduction indices are discussed.
    Institute of Noise Control Engineering (INCE), Nov. 2023, INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 268(7) (7), 1297 - 1307
    Scientific journal

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Time-domain room acoustic modeling using mass-lumped higher-order tetrahedral finite elements with an explicit time-marching scheme is highly attractive because of its excellent geometrical flexibility with unstructured meshing and applicability into massively parallel computing. However, the standard mass-lumped tetrahedral elements yield an unstable scheme, and only implicit time-marching schemes are available. This study proposes a novel wave-based room acoustics solver based on a high-order explicit time-domain FEM. The present solver uses mass-lumped 15-node tetrahedral elements for spatial discretization and a dissipation-free two-stage partitioned Runge-Kutta time integration for time discretization. The 15-node tetrahedral elements had been developed to apply mass-lumping methods to 10-node tetrahedral elements, which are the most common finite element in engineering applications, but its applicability in room acoustics problems is unknown. Higher accuracy and efficiency of the proposed method over the standard method using 10-node tetrahedral elements is presented through an eigenvalue analysis of a long duct model and acoustic simulations in a small room. Additionally, frequency-dependent sound absorbing boundary is implemented by revising an auxiliary differential equation method.
    Institute of Noise Control Engineering (INCE), Nov. 2023, INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 268(3) (3), 5251 - 5261
    Scientific journal

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    This paper presents a proposal of an efficient binaural room-acoustics auralization method, an essential goal of room-acoustics modeling. The method uses a massively parallel wave-based room-acoustics solver based on a dispersion-optimized explicit time-domain finite element method (TD-FEM). The binaural room-acoustics auralization uses a hybrid technique of first-order Ambisonics (FOA) and head-related transfer functions. Ambisonics encoding uses room impulse responses computed by a parallel wave-based room-acoustics solver that can model sound absorbers with complex-valued surface impedance. Details are given of the novel procedure for computing expansion coefficients of spherical harmonics composing the FOA signal. This report is the first presenting a parallel wave-based solver able to simulate room impulse responses with practical computational times using an HPC cloud environment. A meeting room problem and a classroom problem are used, respectively, having 35 million degrees of freedom (DOF) and 100 million DOF, to test the parallel performance of up to 6144 CPU cores. Then, the potential of the proposed binaural room-acoustics auralization method is demonstrated via an auditorium acoustics simulation of up to 5 kHz having 750,000,000 DOFs. Room-acoustics auralization is performed with two acoustics treatment scenarios and room-acoustics evaluations that use an FOA signal, binaural room impulse response, and four room acoustical parameters. The auditorium acoustics simulation showed that the proposed method enables binaural room-acoustics auralization within 13,000 s using 6144 cores.
    MDPI AG, Feb. 2023, Applied Sciences, 13(5) (5), 2832 - 2832
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yohei Tsukamoto, Kaoru Tamai, Kimihiro Sakagami, Takeshi Okuzono, Yoshihiro Tomikawa
    Acoustical Society of Japan, Nov. 2022, Acoustical Science and Technology, 43(6) (6), 335 - 338
    Scientific journal

  • Designable heterogeneous MPPs and their applications
    Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono
    Lead, Oct. 2022, Proc. of 24th International Congress on Acoustics, Gyeong-ju, Korea, ABS-0482, English
    [Invited]
    International conference proceedings

  • Marie Mimura, Yohei Tsukamoto, Yoshihiro Tomikawa, Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, Sep. 2022, Acoustical Science and Technology, 43(5) (5), 276 - 279
    Scientific journal

  • Marie Mimura, Takeshi Okuzono, Kimihiro Sakagami
    This paper presents discussion of the prediction capability of three numerical models using finite element method for predicting the sound reduction index (SRI) of fixed windows having different dimensions in a laboratory environment. The three numerical models tested here only discretize the window part or windows part and the space around the windows to reduce the necessary computational cost for vibroacoustics simulations. An ideal diffused sound incidence condition is assumed for three models. Their predictability and numerical efficiency were examined over five fixed windows with different dimensions compared to measured SRIs. First, the accuracy of the simplest model in which the window part is only discretized with finite elements was examined. Acoustic radiation to the transmission field is computed using Rayleigh’s integral. Calculations were performed under two loss factor setups respectively using internal loss factors of each material and measured total loss factor of each window. The results were then compared with the measured values. Results revealed the effectiveness of using the measured total loss factor at frequencies around and above the coincidence frequencies. Subsequently, we tested the prediction accuracy of a numerical model that includes a niche existing in a laboratory environment. Also, hemispherical free fields around the window are discretized using fluid elements and infinite fluid elements. The results underscored the importance of including a niche in a numerical model used to predict sound reduction index below 1 kHz for smaller windows accurately. Nevertheless, this numerical model, including a niche, entails high computational costs. To enhance the prediction efficiency, we examined the applicability of a weak-coupling model that divides calculation procedures into three steps: (1) incidence field calculation to the window surface, (2) sound transmission calculation in fixed windows, and (3) sound radiation calculation from a window surface to a transmission field. Results revealed that the weak-coupling model produces almost identical results to those of a strong-coupling model, but with higher efficiency.
    Frontiers Media SA, Aug. 2022, Frontiers in Built Environment, 8
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono
    Recently, dotted-art MPPs have been proposed in which a designed pattern is made with the holes. In such a case, the MPP becomes heterogeneous in general. However, existing theories used for the prediction of the absorption characteristics of MPPs assume homogeneity. Therefore, the elaboration of a method for heterogeneous MPPs needs to be performed. In previous work, the authors proposed a method to predict the absorption characteristics of a heterogeneous MPP by using synthesized impedances of each part with different parameters; this is called the synthetic impedance method (SIM) in the present paper. The SIM can potentially be used for various heterogeneous MPPs; however, its scope of applicability needs to be clarified. Furthermore, in proposing a design concept of dotted-art heterogeneous MPPs, the condition that would make the designed MPPs fall within the scope of the SIM needs to be determined. Therefore, in this study, in order to clarify the scope of the applicability of the SIM, twelve samples are first prepared, and then measured sound absorption characteristics and predicted ones are compared and examined in terms of prediction errors. The results show that there are two conditions that should be met to produce predictable heterogeneous MPPs: (1) holes are distributed over the entire surface of the specimen, and (2) the hole spacing is constant. Considering these conditions, a design concept for a dotted-art heterogeneous MPP is proposed: two types of holes, larger holes for the pattern and smaller holes for the background, should be used to meet the above two conditions. Case studies with nine prototypes show that the SIM can make predictions for dotted-art heterogeneous MPPs fabricated according to the concept described above.
    MDPI AG, Jul. 2022, Acoustics, 4(3) (3), 588 - 608, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Iwan Prasetiyo, Khoerul Anwar, Ferio Brahmana, Kimihiro Sakagami
    Last, Elsevier BV, Jun. 2022, Applied Acoustics, 195, 108842 - 108842, English
    [Refereed]
    Scientific journal

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Wave-based acoustics simulation methods such as finite element method (FEM) are reliable computer simulation tools for predicting acoustics in architectural spaces. Nevertheless, their application to practical room acoustics design is difficult because of their high computational costs. Therefore, we propose herein a parallel wave-based acoustics simulation method using dissipation-free and dispersion-optimized explicit time-domain FEM (TD-FEM) for simulating room acoustics at large-scale scenes. It can model sound absorbers with locally reacting frequency-dependent impedance boundary conditions (BCs). The method can use domain decomposition method (DDM)-based parallel computing to compute acoustics in large rooms at kilohertz frequencies. After validation studies of the proposed method via impedance tube and small cubic room problems including frequency-dependent impedance BCs of two porous type sound absorbers and a Helmholtz type sound absorber, the efficiency of the method against two implicit TD-FEMs was assessed. Faster computations and equivalent accuracy were achieved. Finally, acoustics simulation of an auditorium of 2271 m3 presenting a problem size of about 150,000,000 degrees of freedom demonstrated the practicality of the DDM-based parallel solver. Using 512 CPU cores on a parallel computer system, the proposed parallel solver can compute impulse responses with 3 s time length, including frequency components up to 3 kHz within 9000 s.
    Last, MDPI AG, Jan. 2022, Buildings, 12(2) (2), 105 - 105, English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Shunichi Mukae, Takeshi Okuzono, Kimihiro Sakagami
    Partition of unity finite element method with plane wave enrichment (PW-FEM) uses a shape function with a set of plane waves propagating in various directions. For room acoustic simulations in a frequency domain, PW-FEM can be an efficient wave-based prediction method, but its practical applications and especially its robustness must be studied further. This study elucidates PW-FEM robustness via 2D real-scale office room problems including rib-type acoustic diffusers. We also demonstrate PW-FEM performance using a sparse direct solver and a high-order Gauss–Legendre rule with a recently developed rule for ascertaining the number of integration points against the classical linear and quadratic FEMs. Numerical experiments investigating mesh size and room geometrical complexity effects on the robustness of PW-FEM demonstrated that PW-FEM becomes more robust at wide bands when using a mesh in which the maximum element size maintains a comparable value to the wavelength of the upper-limit frequency. Moreover, PW-FEM becomes unstable with lower spatial resolution mesh, especially for rooms with complex shape. Comparisons of accuracies and computational costs of linear and quadratic FEM revealed that PW-FEM requires twice the computational time of the quadratic FEM with a mesh having spatial resolution of six elements per wavelength, but it is highly accurate at wide bands with lower memory and with markedly fewer degrees of freedom. As an additional benefit of PW-FEM, the impulse response waveform of quadratic FEM in a time domain was found to deteriorate over time, but the PW-FEM waveform can maintain accurate waveforms over a long time.
    Last, MDPI AG, Jan. 2022, Acoustics, 4(1) (1), 53 - 73, English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Marie Mimura, Takeshi Okuzono, Kimihiro Sakagami
    Last, Acoustical Society of Japan, Jan. 2022, Acoustical Science and Technology, 43(1) (1), 32 - 42, English
    [Refereed]
    Scientific journal

  • Shunichi Mukae, Takeshi Okuzono, Kanako Tamaru, Kimihiro Sakagami
    Last, Elsevier BV, Jan. 2022, Applied Acoustics, 185, 108383 - 108383, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yohei Tsukamoto, Kaoru Tamai, Kimihiro Sakagami, Takeshi Okuzono, Yoshihiro Tomikawa
    Acoustical Society of Japan, Nov. 2021, Acoustical Science and Technology, 42(6) (6), 350 - 353, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takeshi Okuzono, Takumi Yoshida, Kimihiro Sakagami
    Last, Elsevier BV, Nov. 2021, Applied Acoustics, 182, 108212 - 108212, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Last, Acoustical Society of Japan, Sep. 2021, Acoustical Science and Technology, 42(5) (5), 270 - 281, English
    [Refereed]
    Scientific journal

  • Kanako Tamaru, Takeshi Okuzono, Shunichi Mukae, Kimihiro Sakagami
    Last, Acoustical Society of Japan, Sep. 2021, Acoustical Science and Technology, 42(5) (5), 231 - 240, English
    [Refereed]
    Scientific journal

  • Takumi Yoshida, Takeshi Okuzono, Yui Sugimoto, Kimihiro Sakagami
    Accurate boundary modelings that address the frequency-dependent sound absorption characteristics of various sound absorbers are crucial for wave-based room acoustic simulation. In time-domain simulations, however, a computationally demanding convolution appears in frequency-dependent impedance boundary conditions. The present paper proposes a room acoustic solver with a fourth-order accurate explicit TD-FEM, incorporating a frequency-dependent absorbing boundary condition efficiently using a recursive convolution method, namely the auxiliary differential equation (ADE) method. Its performance against the fourth-order accurate frequency-domain FEM is examined via 2D real-scale room acoustic problems, solving a sound propagation in an office room up to 4.5 kHz. Firstly, we describe briefly the formulation of the proposed room acoustics solver based on the explicit TD-FEM. Then, the discretization error property of the proposed method is evaluated via an impedance tube problem, including a frequency-dependent impedance boundary of porous sound absorber. Finally, the accuracy and efficiency of the proposed method are demonstrated with the comparison of frequency-domain FEM solver, which uses a sparse direct solver for the solution of the linear system at each frequency. Results showed the proposed method can perform an acoustic simulation with significantly low computational costs compared to the frequency-domain solver while keeping an acceptable level of accuracy.
    Institute of Noise Control Engineering (INCE), Aug. 2021, INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 263(5) (5), 1120 - 1129
    Scientific journal

  • Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono, Shigeyuki Kido, Daichi Yamaguchi
    There are various measures currently in place to prevent the spread of coronavirus (COVID-19); however, in some cases, these can have an adverse effect on the acoustic environment in buildings. For example, transparent acrylic partitions are often used in eating establishments, meeting rooms, offices, etc., to prevent droplet infection. However, acrylic partitions are acoustically reflective; therefore, reflected sounds may cause acoustic problems such as difficulties in conversation or the leakage of conversation. In this study, we performed a prototyping of transparent acrylic partitions to which a microperforated panel (MPP) was applied for sound absorption while maintaining transparency. The proposed partition is a triple-leaf acrylic partition with a single acrylic sheet without holes between two MPP sheets, as including a hole-free panel is important to prevent possible droplet penetration. The sound absorption characteristics were investigated by measuring the sound absorption in a reverberation room. As the original prototype showed sound absorption characteristics with a gentle peak and low values due to the openings on the periphery, it was modified by closing the openings on the top and sides. The sound absorption performance was improved to some extent when the top and sides were closed, although there remains the possibility of further improvement. For this study, only the sound absorption characteristics were examined in the prototype experiments. The effects during actual use will be the subject of future study.
    UCL Press, Jul. 2021, UCL Open Environment, 2(9) (9)
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Midori Kusaka, Kimihiro Sakagami, Takeshi Okuzono
    Micro-perforated panels (MPPs) are one of the most promising alternatives to conventional porous sound-absorbing materials. Traditionally, the theory of the sound absorption properties of MPPs is based on the assumption that MPPs are a homogeneous material with identical pores at regular intervals. However, in recent years, some MPPs have not met these conditions, and although a variety of designs have been created, their properties and prediction methods were studied in only fewer works. In this paper, considering the wide variety of MPP designs, we made a trial production of heterogeneous MPPs, which are MPPs with holes of different diameters, and studied the prediction method applicable to these MPPs. We measured the normal incidence sound absorption characteristics of those MPPs, backed by a rigid backing and air-cavity in-between, in an impedance tube. The prediction method proposed in this work is to treat the heterogeneous MPPs as combinations of several homogeneous components, and to combine them after applying the existing theory on homogeneous MPPs to each component. As a result, except in a few cases, the measured and predicted values of the absorption properties agreed relatively well. We also found that the arrangement of the holes in the material and the depth of the back cavity affected the agreement between the measured and predicted results.
    Corresponding, MDPI AG, Jul. 2021, Acoustics, 3(3) (3), 473 - 484, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yohei Tsukamoto, Kimihiro Sakagami, Takeshi Okuzono, Yoshihiro Tomikawa
    As a basic study of a practical method for predicting the sound insulation performance of windows, this report presents a study of the sound reduction index of windows with single glazing, below a critical frequency. First, the results calculated by an existing theory for a single plate for the sound reduction indices are compared with measured results of actual windows to assess the theory’s applicability for evaluating the sound insulation performance of windows. Then, a regression analysis is employed to measure the results of a certain number of actual windows to explore a further development of a more practical prediction. The following findings were obtained: (1) Sound reduction indices of actual fixed windows are predictable using Sewell’s transmission theory for a single plate. However, sound reduction indices of openable windows, especially those of sliding windows, are strongly affected by gaps in the window frame. Therefore, predicting sound reduction indices of all windows accurately is difficult if using only one theory. (2) The frequency slope of the window reduction index is much lower than that of the mass law. Regression analyses indicate that the frequency slope of the reduction index of all examined windows is 3.0 dB per octave, on average.
    UCL Press, May 2021, UCL Open Environment, (2)(06) (06), English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Performance of a dispersion-optimized explicit fem in room acoustic simulations including impedance boundaries
    Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Silesian University Press, 2021, "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021, English
    International conference proceedings

  • Kimihiro Sakagami, Takeshi Okuzono
    In this study, we first point out the possible acoustic problems associated with the post-pandemic operation of built environments. In particular, we focus on the problem of acoustic deficiency due to the lack of absorption. This deficiency, which is likely to be encountered in most enclosed spaces in a range of establishments, is due to the reduced number of audience members or users of the space as a result of social distancing. As one of the promising solutions to this problem, we introduce a sound absorption technique using three-dimensional (3D) space sound absorbers developed through our recent research projects. Significantly, the type of sound absorber proposed herein is made of materials that are especially suited to hygiene considerations. The materials are microperforated panels (MPPs) and permeable membranes (PMs), both of which are easily washable and sanitised. Furthermore, we point out that 3D-MPP or PM space absorbers possess the additional value of aesthetic designability.
    UCL Press, Nov. 2020, UCL Open Environment, (1) (1), 1 - 10, English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami
    This communication compares the previously reported results of the acoustic environment, mainly noise levels at a fixed point, in a quiet residential area in Kobe, Japan, under the declaration of the COVID-19 state of emergency in May 2020 with the results of two follow-up studies in the same area: subsequent follow-up noise measurements in June and July–August 2020, and the present results of measurements in September–October 2020. The results of the comparison among the above three measurements suggest that noise levels were lower during September-October 2020 than during the declaration of the state of emergency in May 2020. In the period from May to October 2020, the noise level was significantly higher in July and August of the same year due to the sound of cicadas, which are common in this area. This suggests that it is difficult to set the target values of the acoustic environment planning by referring to the low noise level at lockdown or similar measures in areas with large seasonal variations in acoustic environment. Although many case studies are necessary to obtain appropriate target values, one case study is presented in this communication to illustrate an example and discuss its difficulty.
    MDPI AG, Nov. 2020, Urban Science, 4(4) (4), 63 - 63, English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Last, Acoustical Society of Japan, Nov. 2020, Acoustical Science and Technology, 41(6) (6), 837 - 840, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Last, Acoustical Society of Japan, Nov. 2020, Acoustical Science and Technology, 41(6) (6), 819 - 822, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono, Shigeyuki Kido, Daichi Yamaguchi
    Acoustical Society of Japan, Sep. 2020, Acoustical Science and Technology, 41(5) (5), 784 - 787, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • A note on the acoustic environment in a usually quiet residential area after the 'state of emergency' declaration due to COVID-19 pandemic in Japan was lifted: supplementary survey results in post-emergency situations
    SAKAGAMI, Kimihiro
    Sep. 2020, Noise Mapping, 7, 1 - 7, English
    [Refereed]
    Scientific journal

  • Three-dimensional MPP space absorbers: An overview of the project and recent development
    Midori Kusaka, Kimihiro Sakagami, Takeshi Okuzono, Shigeyuki Kido, Daichi Yamaguchi
    Korean Society of Noise and Vibration Engineering, Aug. 2020, Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020, English
    International conference proceedings

  • A formulation of time-domain FEM for room acoustic simulations with frequency-dependent locally-reacting impedance boundary
    Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Korean Society of Noise and Vibration Engineering, Aug. 2020, Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020, English
    International conference proceedings

  • Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono, Shinsuke Nakanishi
    In this study, we discuss the effect of the manufacturing accuracy of a microperforated panel (MPP) produced by 3D printers on acoustic properties through measured and calculated results as a pilot study. The manufacturing costs of MPPs have long been one of their shortcomings; however, with recent developments in the manufacturing process, low-cost MPPs are now available. In a further attempt at reducing the cost, 3D printing techniques have recently been considered. Cases of trial production of MPPs manufactured by 3D printing have been reported. When introducing such new techniques, despite the conventional microdrill procedure, manufacturing accuracy can often become an issue. However, there are few studies reporting the effect of manufacturing accuracy on the acoustic properties in the case of 3D-printed MPPs. Considering this situation, in this pilot study, we attempted to produce MPPs with circular and rectangular perforations using a consumer 3D printer of the additive manufacturing type. The hole sizes of the specimens were measured, and the accuracy was evaluated. The normal incidence absorption coefficient and specific impedance were measured using an impedance tube. The measured results were compared with the theoretical values using Guo’s model. Through these basic studies, the MPPs produced by an additive manufacturing 3D printer demonstrated good sound absorption performance; however, due to the large deviations of parameters, the agreement with the theoretical values was not good, which suggests that it is difficult to predict the acoustic properties of MPPs made by a consumer-grade additive manufacturing 3D printer.
    MDPI AG, Aug. 2020, Acoustics, 2(3) (3), 605 - 616
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Jorge P. Arenas, Kimihiro Sakagami
    Technological advances in materials science, manufacturing processes, chemistry and nanoscience have led to enormous developments in innovatively engineered materials over recent decades. Among them, sustainable acoustic materials have helped to improve acoustical comfort in built environments, and their use is rapidly growing in the architecture, automotive, aerospace and construction industries. These materials are manufactured through a responsible interaction with the environment in order to avoid a depletion or degradation of the natural resources, and to allow for long-term environmental quality. This Special Issue reports on some research studies on membrane absorbers and fibrous materials of natural origin that can be sustainable alternatives to traditional acoustic materials.
    Last, MDPI AG, Aug. 2020, Sustainability, 12(16) (16), 6540 - 6540
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami
    The COVID-19 pandemic caused lockdowns in many countries worldwide. Acousticians have made surveys to monitor how cities became quieter under the lockdown, mainly in central areas in cities. However, there have been few studies on the changes in the acoustic environment due to the pandemic in the usually quieter residential areas. It may be expected to be different from the effect in ‘originally noisy’ areas. Also, the effect could be different in Japan, because the ‘state of emergency’ declaration there was different to lockdowns elsewhere. Considering these circumstances, this article reports the results of noise monitoring and makes some observations on the acoustic environment in residential areas far from city centres, to provide an example of how the acoustic environment was affected by the state of emergency declaration due to the COVID-19 pandemic in Japan. The results showed that the reduction of noise levels was somewhat less than that reported in large cities. Also, comparing the results after the cancellation of the state of emergency, the noise level increased again. However, observations of noise sources imply that a possible change in human behaviour may have also affected the acoustic environment.
    Lead, UCL Press, Aug. 2020, UCL Open Environment, 1(6) (6), English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yohei Tsukamoto, Yoshihiro Tomikawa, Kimihiro Sakagami, Takeshi OKuzono, Hidetoshi Maikawa, Yusuke Komoto
    As described herein, the sound insulation performance of a double window with absorbent materials on the perimeter of its cavity is studied experimentally. Two experiments are used to measure the sound reduction indices. The first experiment was performed with a double window composed of commercially available products. The second was conducted with a model constructed of two acrylic panels: a simplified model of a double window with a cavity between the panes. As the result of the first experiment, the improvement in reduction index obtained by the attached absorbent was around 4 dB. In the second experiment, though some negative effect was observed at low frequencies, the increase in reduction index was about 12 dB at maximum. Consequently, the following findings were obtained: (1) Acoustic transmission characteristics of a double window are affected mainly by resonances of two types: mass-air-mass resonance of window panes and the air cavity, and the acoustic mode resonances of the air cavity in-between; (2) acoustic mode resonance is suppressed by attaching absorbent materials on the inside of the cavity of window. Consequently, the sound reduction index increases.
    ELSEVIER, Aug. 2020, Applied Acoustics, 165, 107317, English, International magazine
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, Jul. 2020, Acoustical Science and Technology, 41(4) (4), 689 - 692
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Takeshi Okuzono, Hirotaka Suzuki, Nao Koyanagi, Masahiro Toyoda
    Jun. 2020, INTERNATIONAL JOURNAL OF ACOUSTICS AND VIBRATION, 25(2) (2), 243 - 247, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    This paper presents a proposal of a time domain room acoustic solver using novel fourth-order accurate explicit time domain finite element method (TD-FEM), with demonstration of its applicability for practical room acoustic problems. Although time domain wave acoustic methods have been extremely attractive in recent years as room acoustic design tools, a computationally efficient solver is demanded to reduce their overly large computational costs for practical applications. Earlier, the authors proposed an efficient room acoustic solver using explicit TD-FEM having fourth-order accuracy in both space and time using low-order discretization techniques. Nevertheless, this conventional method only achieves fourth-order accuracy in time when using only square or cubic elements. That achievement markedly impairs the benefits of FEM with geometrical flexibility. As described herein, that difficulty is solved by construction of a specially designed time-integration method for time discretization. The proposed method can use irregularly shaped elements while maintaining fourth-order accuracy in time without additional computational complexity compared to the conventional method. The dispersion and dissipation characteristics of the proposed method are examined respectively both theoretically and numerically. Moreover, the practicality of the method for solving room acoustic problems at kilohertz frequencies is presented via two numerical examples of acoustic simulations in a rectangular sound field including complex sound diffusers and in a complexly shaped concert hall.
    {MDPI} {AG}, May 2020, Applied Sciences, 10(11) (11), 3750 - 3750, English, International magazine
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takeshi Okuzono, Koji Uenishi, Kimihiro Sakagami
    Permeable membranes (PMs), which are air-permeable fabrics made from various natural or chemical fibers that are thinly woven or non-woven, are attractive sound-absorbing materials. The simplest PM absorber is a single-leaf PM absorber (PMSG) with a non-locally reacting rigid backed air cavity in which a PM is placed in front of a rigidly backed air cavity. A honeycomb-backed single-leaf PM absorber (PMHC), which has a locally reacting air cavity, is also well known. However, the two PM absorbers have shortcomings in their diffuse field absorption coefficients attrib- utable to the backing air cavity design. To overcome those shortcomings, we intro- duce a PM absorber array (PMAR): a single-leaf PM absorber with multiple locally reacting air cavities of different depths. As described herein, to present PMAR benefits, we experimentally compare the diffuse field absorption charac- teristics of the three single-leaf PM absorbers with different air cavity designs. Reverberation absorption coefficient measurements were taken using nine thin permeable membranes made of three chemical fibers, each having different flow resistance and surface density. Results show that PMAR is an effective sound ab- sorbing structure to overcome the shortcomings related to the diffuse field absorp- tion coefficients of PMSG and PMHC. Material property effects on permeable membranes are also demonstrated.
    Institute of Noise Control Engineering (INCE), May 2020, Noise Control Engineering Journal, 68(3) (3), 237 - 245, English, International magazine
    [Refereed]
    Scientific journal

  • Takeshi Okuzono, M Shadi Mohamed, Kimihiro Sakagami
    Predicting room acoustics using wave-based numerical methods has attracted great attention in recent years. Nevertheless, wave-based predictions are generally computationally expensive for room acoustics simulations because of the large dimensions of architectural spaces, the wide audible frequency ranges, the complex boundary conditions, and inherent error properties of numerical methods. Therefore, development of an efficient wave-based room acoustic solver with smaller computational resources is extremely important for practical applications. This paper describes a preliminary study aimed at that development. We discuss the potential of the Partition of Unity Finite Element Method (PUFEM) as a room acoustic solver through the examination with 2D real-scale room acoustic problems. Low-order finite elements enriched by plane waves propagating in various directions are used herein. We examine the PUFEM performance against a standard FEM via two-room acoustic problems in a single room and a coupled room, respectively, including frequency-dependent complex impedance boundaries of Helmholtz resonator type sound absorbers and porous sound absorbers. Results demonstrated that the PUFEM can predict wideband frequency responses accurately under a single coarse mesh with much fewer degrees of freedom than the standard FEM. The reduction reaches O(10^-2) at least, suggesting great potential of PUFEM for use as an efficient room acoustic solver.
    {MDPI} {AG}, Mar. 2020, Applied Sciences, 10(6) (6), 1969 - 1969, English, International magazine, Co-authored internationally
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Fumiaki Satoh, Akira Omoto
    Geo-referenced sound data are often used in the field of acoustics education to learn about the urban acoustic environment. Simple soundwalks and sound collections are also employed, in which acquiring additional information such as visual data, recorded sound data, and GPS location data are helpful to produce a map with sound data and sound collection and to carry out more profound discussions in educational activities. In order to enrich these acoustic educational and environmental survey activities with a simple tool, the use of multifunctional sound-pressure level (SPL) measurement applications with mobile devices are proposed. Some experiences of combined activities of the above methods using the applications and mobile devices are reported in this paper. In this study, applications for SPL measurements, which record GPS location data, sound, photo, and video during measurements, were used to produce geo-referenced sound data. First, the accuracy of the applications was checked and we found them to have reasonable accuracy when used with iOS devices; for example, the averaged error was less than 1.5 dB(A) with iPhone XS. Next, they were actually used in a simple soundwalk-like field survey and the resulting geo-referenced sound data were presented to discuss the merits and demerits of each application. Overall, the applications used in this work were found to be useful; for example, recorded sound allowed us to check the main sound source and to carry out discussions using collected sound samples later, and photos and videos allowed us to grasp the impressions and situations around the measuring points. Therefore, these multifunctional sound level meter (SLM) applications can be effectively used for various purposes, including acoustics education for learning about urban acoustic environments.
    {MDPI} {AG}, Dec. 2019, Urban Science, 3(4) (4), 111 - 111, English
    [Refereed][Invited]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • OKUZONO Takeshi, SAKAGAMI Kimihiro, OTSURU Toru
    This paper presents an overview of the applicability of implicit time-domain FEM (TD-FEM) for room acoustics simulation, which has fourth-order accuracy in both space and time. First, the TD-FEM algorithm is presented with explanations of dispersion-reduced finite elements for spatial discretization and a time integration method for time discretization. The theoretical dispersion error property is also shown. Use of the dispersion-reduced scheme presents benefits in terms of accuracy, stability and convergence of an iterative solver, which have a marked effect on the computational cost. Then, the applicability of TD-FEM is demonstrated using two numerical examples on room acoustics simulation in the kilohertz frequency range, which are acoustics simulations of a simply shaped concert hall and simulation of reverberation absorption coefficient measurements. In numerical examples of concert hall analysis, comparison with a conventional TD-FEM presents the efficiency of the dispersion-reduced TD-FEM. Modeling accuracy of non-locally reacting permeable membrane sound absorbers for the TD-FEM is presented through simulation of reverberation room method.
    Sep. 2019, Proceedings of 23rd International Congress on Acoustics, 6070 - 6077, English, International magazine
    [Refereed]
    International conference proceedings
    Link to Kobe Univ. Repository (Kernel)

  • YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    Sep. 2019, Proceedings of 23rd International Congress on Acoustics, 763 - 770, English
    [Refereed]
    Scientific journal

  • OKUZONO TAKESHI, SHIMIZU NORIYASU, SAKAGAMI KIMIHIRO
    Permeable membranes (PMs), which are air-permeable thin woven fabrics or non-woven fabrics, are attractive sound-absorbing materials used to control acoustics in buildings. Although the absorption characteristics of various PM absorbers have been studied extensively, it has not been established how to incorporate PMs into a wave-based acoustic simulation method known as the tim
    Aug. 2019, Applied Acoustics, 151, 172 - 182, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Fumiaki Satoh, Akira Omoto
    In this paper, we revisit the acoustics education program using mobile devices to better understand urban environments. We begin with a summary of our past projects to demonstrate a model case of the concept. In these projects, the output was mainly supposed to be a noise map with measured sound pressure levels (SPLs) and sound spectra. This methodology can obviously be applied
    MDPI (Basel), Jul. 2019, Urban Science, 3(3) (3), 73 - (13 pages), English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Masahiro Toyoda, Kota Funahashi, Takeshi Okuzono, Kimihiro Sakagami
    {MDPI} {AG}, May 2019, Sustainability, 11(9) (9), 2714 - 2714, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • OKUZONO TAKESHI, NITTA TAKAO, SAKAGAMI KIMIHIRO
    May 2019, Acoustical Science and Technology, 40(3) (3), 221 - 224, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • SAKAGAMI KIMIHIRO, OKUZONO TAKESHI, SOMATOMO YU, FUNAHASHI KOTA, TOYODA MASAHIRO
    Apr. 2019, Sustainability, 11(7) (7), 2185, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Asniawaty Kusno, SAKAGAMI KIMIHIRO, OKUZONO TAKESHI, TOYODA MASAHIRO, OTSURU TORU, Rosady Mulyadi, Kusno Kamil
    Mar. 2019, Sustainability, 11(5) (5), 1476, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • TAKAHASHI KATSUTOSHI, YAIRI MOTOKI, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO, TOYODA MASAHIRO
    Jan. 2019, Acoustical Science and Technology, 40(1) (1), 52 - 55, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yairi Motoki, Sakagami Kimihiro, Okuzono Takeshi
    2019, ACOUSTICAL SCIENCE AND TECHNOLOGY, 40(5) (5), 325 - 335
    [Refereed]
    Link to Kobe Univ. Repository (Kernel)

  • Hoshi Kazuma, Hanyu Toshiki, Okuzono Takeshi, Sakagami Kimihiro, Yairi Motoki, Harada Shinji, Takahashi Seiji, Ueda Yasutaka
    Jan. 2019, APPLIED ACOUSTICS, 157
    [Refereed]
    Link to Kobe Univ. Repository (Kernel)

  • OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    Sep. 2018, Acoustical Science and Technology, 39(5) (5), 362 - 365, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • RELATIONSHIP BETWEEN SOUND RADIATION FROM SOUND-INDUCED AND FORCE-EXCITED VIBRATION
    YAIRI Motoki, SAKAGAMI Kimihiro, OKUZONO Takeshi
    Jul. 2018, Proc of 25th Internaltional Congress on Sound and Vibration, No.287, 1 - 8, English
    [Refereed][Invited]
    International conference proceedings

  • IMPLEMENTATION EXPERIMENT OF A HONEYCOMB-BACKED MPP SOUND ABSORBING PANEL IN A MEETING ROOM
    HOSHI Kazuma, HANYUToshiki, SAKAGAMI Kimihiro, OKUZONO Takeshi, YAIRI Motoki, HARADA Shinji, TAKAHASHI Seiji, UEDA Yasutaka
    Jul. 2018, Proc of 25th Internaltional Congress on Sound and Vibration, No.1049, 1 - 8, English
    [Refereed][Invited]
    International conference proceedings

  • A THREE-DIMENSIONAL TIME-DOMAIN FINITE ELEMENT METHOD BASED ON FIRST-ORDER ORDINARY DIFFERENTIAL EQUATIONS FOR TREATING PERMEABLE MEMBRANE ABSORBERS
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    Jul. 2018, Proc of 25th Internaltional Congress on Sound and Vibration, No.838, 1 - 7, English
    [Refereed]
    International conference proceedings

  • AN EXPERIMANTAL STUDY ON THE ABSORPTION CHARACTERISTICS OF PERMEABLE MEMBRANE ABSORBERS ARRAY
    OKUZONO Takeshi, UENISHI Koji, SAKAGAMI Kimihiro, SHIMIZU Hikaru
    Jul. 2018, Proc of 25th Internaltional Congress on Sound and Vibration, No.48, 1 - 6, English
    [Refereed][Invited]
    International conference proceedings

  • YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    May 2018, Noise Control Engineering Journal, 66(3) (3), 176 - 189, English
    [Refereed]
    Scientific journal

  • Relation between sound radiation from airborne-sound and point-force excitations of a double-leaf plate
    Motoki Yairi, Kimihiro Sakagami, Takeshi Okuzono
    Institute of Noise Control Engineering, 2018, INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, English
    International conference proceedings

  • Takeshi Okuzono, Kimihiro Sakagami
    Jan. 2018, APPLIED ACOUSTICS, 129, 1 - 12, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • A first-order ODE based explicit time-domain FEM for room acoustic simulations
    OKUZONO Takeshi, YOSHIDA Takumi, SAKAGAMI Kimihiro
    Aug. 2017, Proc of inter.noise2017, 371 - 379, English
    [Refereed][Invited]
    International conference proceedings

  • An implicit time-domain finite element scheme for sound field analysis with permeable membrane absorbers
    OKUZONO Takeshi, SAKAGAMI Kimihiro, KATSUYAMA Akihiro
    Jul. 2017, Proc of 24th Internaltional Congress on Sound and Vibration, NO.961, 1 - 8, English
    [Refereed][Invited]
    International conference proceedings

  • Chicken feather: An alternative of acoustical materials
    Asniawaty Kusno, Masahiro Toyoda, Kimihiro Sakagami, Takeshi Okuzono, Toru Otsuru, Kusno Kamil, Vovi Masgode
    International Institute of Acoustics and Vibration, IIAV, 2017, 24th International Congress on Sound and Vibration, ICSV 2017, English
    International conference proceedings

  • Emi Toyoda, Takeshi Okuzono, Mitsuru Okano, Kimihiro Sakagami, Masahiro Toyoda
    Jan. 2017, Applied Acoustics, 116, 311 - 316, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Koji Uenishi, Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, 2017, Acoustical Science and Technology, 38(6) (6), 322 - 325, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Fumiaki Satoh, Akira Omoto
    Acoustical Society of America, Nov. 2016, Proceedings of Meetings on Acoustics, 29(1) (1), English
    [Refereed][Invited]
    International conference proceedings
    Link to Kobe Univ. Repository (Kernel)

  • 通気性膜を用いた立体型空間吸音体の吸音特性の3次元境界要素解析
    FUNAHASHI Kouta, TOYODA Masahiro, SAKAGAMI Kimihiro, OKUZONO Takeshi
    日本音響学会, Jul. 2016, 日本音響学会誌, 72(7) (7), 383 - 385, Japanese
    [Refereed]
    Scientific journal

  • 長方形要素を用いた陽的時間領域有限要素法による室内音場解析のための修正積分則
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会, Jul. 2016, 日本音響学会誌, 72(7) (7), 367 - 373, Japanese
    [Refereed]
    Scientific journal

  • Motoki Yairi, Kimihiro Sakagami, Kosuke Nishibara, Takeshi Okuzono
    Jul. 2016, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 140(1) (1), 453 - 460, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Takeshi Okuzono, Takumi Yoshida, Kimihiro Sakagami, Toru Otsuru
    Mar. 2016, APPLIED ACOUSTICS, 104, 76 - 84, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • A note on the relationship between airborne sound transmission and structure-borne sound radiation: Basic study using classical approximate solution for a single-leaf elastic plate
    YAIRI MOTOKI, SAKAGAMI KIMIHIRO, OKUZONO TAKESHI, NISHIBARA KOSUKE
    日本音響学会, Feb. 2016, Journal of the Acoustical Society of Japan (J), 72(2) (2), 68 - 72, Japanese
    [Refereed]
    Scientific journal

  • Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, 2016, Acoustical Science and Technology, 37(1) (1), 46 - 49, English
    [Refereed]
    Scientific journal

  • Fumiaki Satoh, Kimihiro Sakagami, Akira Omoto
    Acoustical Society of Japan, 2016, Acoustical Science and Technology, 37(4) (4), 165 - 172, English
    [Refereed]
    Scientific journal

  • Three-dimensional MPP and permeable membrane space sound absorbers: An overview
    SAKAGAMI KIMIHIRO, OKUZONO TAKESHI, YAIRI MOTOKI, TOYODA MASAHIRO
    WESPAC, Dec. 2015, Proceedings of 12th WESPAC, English
    [Refereed][Invited]
    International conference proceedings

  • Masahiro Toyoda, Shota Fujita, Kimihiro Sakagami
    Dec. 2015, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 138(6) (6), 3531 - 3538, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • A comparison of absorption models of microperforated panel absorbers on room acoustics simulations using finite element method
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    Dec. 2015, Proc of 12th Wespac, No.O4000037, 63 - 66, English
    [Refereed]
    International conference proceedings

  • On the relationship between the normal incidence airborne sound-excited and the structurally-excited sound radiation from a wall: A theoretical trial with simplified models
    YAIRI MOTOKI, SAKAGAMI KIMIHIRO, NISHIBARA KOSUKE, OKUZONO TAKESHI
    Multi-Science Publishing, Oct. 2015, Journal of Building Acoustics, 22(2) (2), 109 - 122, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • SAKAGAMI KIMIHIRO
    Arpa Press, Aug. 2015, International Journal of Reseach and Reviews in Applied Sciences, 24(2) (2), 59 - 66, English
    [Refereed]
    Scientific journal

  • Takeshi Okuzono, Kimihiro Sakagami
    Aug. 2015, APPLIED ACOUSTICS, 95, 20 - 26, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • 通気性単一膜を用いた矩形平面状空間吸音体の残響室法吸音率測定
    SOMATOMO YU, OKUZONO TAKESHI, FUNAHASHI KOTA, SAKAGAMI KIMIHIRO, TOYODA MASAHIRO
    日本音響学会, Jun. 2015, 日本音響学会誌, 71(6) (6), 276 - 277, Japanese
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • An experimental study on the absorption characteristics of a three-dimensional permeable membrane space sound absorber
    Kimihiro Sakagami, Kota Funahashi, Yu Somatomo, Takeshi Okuzono, Chinami Nishikawa, Masahiro Toyoda
    May 2015, NOISE CONTROL ENGINEERING JOURNAL, 63(3) (3), 300 - 307, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • An experimental study on the sound transmission characteristics of a panel for spherical sound wave incidence
    YAIRI MOTOKI, TSUKAMOTO YOHEI, SAKAGAMI KIMIHIRO
    Kobe University, Mar. 2015, Memoirs of the Graduate School of Engineering and System Informatics, Kobe University, (6) (6), 1 - 5, Japanese
    [Refereed]
    Research institution
    Link to Kobe Univ. Repository (Kernel)

  • MITSURU OKANO, SAKAGAMI KIMIHIRO, MOTOKI YAIRI
    Kobe University, Mar. 2015, Memoirs of the Graduate School of Engineering and System Informatics Kobe University, 6(6) (6), 7 - 12, English
    [Refereed]
    Research institution
    Link to Kobe Univ. Repository (Kernel)

  • Takeshi Okuzono, Kimihiro Sakagami
    Acoustical Society of Japan, 2015, Acoustical Science and Technology, 36(4) (4), 358 - 361, English
    [Refereed]
    Scientific journal

  • Takeshi Okuzono, Toru Otsuru, Kimihiro Sakagami
    Acoustical Society of Japan, 2015, Acoustical Science and Technology, 36(4) (4), 377 - 380, English
    [Refereed]
    Scientific journal

  • 立体型MPP空間吸音体の吸音特性予測
    TOYODA MASAHIRO, FUJITA SHOTA, KOBATAKE SEIJI, SAKAGAMI KIMIHIRO
    関西大学, Jan. 2015, 第19回関西大学先端科学技術シンポジウム論文集, 281 - 286, Japanese
    [Invited]
    Symposium

  • A SIMPLE FREQUENCY DOMAIN FINITE-ELEMENT FORMULATION FOR PREDICTING ABSORPTION CHARACTERISTICS OF MICROPERFORATED PANEL ABSORBERS
    Takeshi Okuzono, Kimihiro Sakagami
    2015, PROCEEDINGS OF THE 22ND INTERNATIONAL CONGRESS ON SOUND AND VIBRATION, 1 - 8, English
    [Refereed][Invited]
    International conference proceedings

  • K. Funahashi, Y. Somatomo, C. Nishikawa, K. Sakagami, T. Okuzono, M. Toyoda
    Due to limitations of computes, prediction of structure-borne sound remain difficult for large-scale problems. Herein a prediction method for low-frequency structure-borne sound transmissions on concrete structures using the finite-difference time-domain scheme is proposed. The target structure is modeled as a composition of multiple plate elements to reduce the dimensions of the simulated vibration field from three-dimensional discretization by solid elements to two-dimensional discretization. This scheme reduces both the calculation time and the amount of required memory. To validate the proposed method, the vibration characteristics using the numerical results of the proposed scheme are compared to those measured for a two-level concrete structure. Comparison of the measured and simulated results suggests that the proposed method can be used to simulate real-scale structures.
    The Japan Society of Mechanical Engineers, Dec. 2014, Journal of the Acoustical Society of America, 6, 18 - 21, English
    [Refereed]
    Scientific journal

  • An explicit time-domain finite-element method for room acoustics simulation
    OKUZONO Takeshi, OTSURU Toru, SAKAGAMI Kimihiro
    Nov. 2014, CD-ROM Proceedings of inter.noise 2014, English
    [Refereed][Invited]
    International conference proceedings

  • Prediction method for absorption characteristics of three-dimensional MPP space absorbers
    TOYODA MASAHIRO, FUJITA SHOTA, KOBATAKE SEIJI, SAKAGAMI KIMIHIRO
    European Association of Acoustics, Sep. 2014, Proceedings of Forum Acusticum （CD-ROM), English
    [Refereed][Invited]
    Scientific journal

  • Utilization of smartphones for teaching introductory architectural/environmental acoustics: Examinations of applications and an example of sound map
    SATOH FUMIAKI, SAKAGAMI KIMIHIRO, OMOTO AKIRA
    大学初年級における音環境導入教育においては,環境で聞いた音をサウンドマップにまとめるなどのサウンドスケープ的手法が取られることが多く,考察は定性的かつ主観的なものにとどまることになる。しかし,客観的な物理量を測定して定量的に考察を進めることも重要である。一方,近年のスマートフォンの普及はめざましく,多数の音響分析アプリケーションもある。本稿では,これらを音環境の導入教育へ利用することを想定し,測定値の精度の検証を行った上で実際の音環境導入教育において考えうるサウンドマップ作成の課題についてその作例を示し,スマートフォンを利用した音環境導入教育への試案について今後の課題を示した。
    Acoustical Society of Japan, May 2014, Journal of the Acoustical Society of Japan, 70(5) (5), 260 - 265, Japanese
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Numerical analyses of the sound absorption of three-dimensional MPP space sound absorbers
    TOYODA MASAHIRO, KOBATAKE SEIJI, SAKAGAMI KIMIHIRO
    Elsevier, Feb. 2014, Applied Acoustics, 79, 69 - 74, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Tomohito Nakamori, Masayuki Morimoto
    Acoustical Society of Japan, 2014, Acoustical Science and Technology, 35(2) (2), 122 - 124, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Motoki Yairi, Takashi Koga, Kenichi Takebayashi, Kimihiro Sakagami
    Elsevier, 2014, Applied Acoustics, 75(1) (1), 67 - 71, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Yusaku Fukutani, Motoki Yairi, Masayuki Morimoto
    Elsevier, 2014, Applied Acoustics, 76, 28 - 34, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • FUNAHASHI Kota, SOMATOMO Yu, NISHIKAWA Chinami, SAKAGAMI Kimihiro, OKUZONO Takeshi, TOYODA Masahiro
    神戸大学大学院工学研究科, 2014, 神戸大学大学院工学研究科・システム情報学研究科紀要, 6(6) (6), 17 - 23, Japanese
    [Refereed]
    Research institution
    Link to Kobe Univ. Repository (Kernel)

  • A theoretical study on the effect of a permeable membrane in the air cavity of a double-leaf microperforated panel space sound absorber
    SAKAGAMI KIMIHIRO, FUKUTANI YUSAKU, YAIRI MOTOKI, MORIMOTO MASAYUKI
    Elsevier, Dec. 2013, Applied Acoustics, 79, 104 - 109, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • An experimental study of a cylindrical microperforated panel sound absorber with core
    FUJITA SHOTA, SAKAGAMI KIMIHIRO, YAIRI MOTOKI, TOYODA EMI, MORIMOTO MASAYUKI
    Institute of Noise Control Engineering, USA, Dec. 2013, Noise Control Engineering Journal, 61(6) (6), 590 - 596, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • AN EXPERIMENTAL STUDY ON THE SOUND ABSORPTION OF THREE-DIMENSIONAL MPP SPACE SOUND ABSORBERS: RECTANGULAR MPP SPACE SOUND ABSORBER (RMSA)
    Kimihiro Sakagami, Motoki Yairi, Emi Toyoda, Masahiro Toyoda
    Aug. 2013, ACOUSTICS AUSTRALIA, 41(2) (2), 156 - 159, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Fumiaki Satoh, Akira Omoto
    日本音響学会, 2013, Acoustical Science and Technology, 34(3) (3), 209 - 211, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Experimental identification of force radiation modes
    Zenzo Yamaguchi, Kimihiro Sakagami, Masayuki Morimoto, J. Stuart Bolton
    Jan. 2013, NOISE CONTROL ENGINEERING JOURNAL, 61(1) (1), 81 - 86, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Reduction of sound radiation by using force radiation modes: effect of a rigid wall near a vibration object
    YAMAGUCHI ZENZO, ISHIBASHI SHINJI, SAKAGAMI KIMIHIRO, MORIMOTO MASAYUKI, BOLTON J, STUART
    Aug. 2012, CD-ROM Proceedings of Inter-Noise 2012, English
    International conference proceedings

  • Sound absorption structures including a microperforated panel, permeable membrane and porous absorbent: An overview
    SAKAGAMI KIMIHIRO, MORIMOTO MASAYUKI
    May 2012, Proceedings of the 5th IBPC, 1127 - 1131, English
    [Refereed]
    International conference proceedings
    Link to Kobe Univ. Repository (Kernel)

  • A case study of introductory teaching method for environmental and architectural acoustics in universities using a smartphone: An examination of applications and an example of sound map
    SAKAGAMI KIMIHIRO, SATOH FUMIAKI, OMOTO AKIRA
    Kobe University, 2012, MEMOIRS OF THE GRADUATE SCHOOLS OF ENGINEERING AND SYSTEM INFORMATICS, KOBE UNIVERSITY, 4(4) (4), 7 - 12, Japanese
    [Refereed]
    Research institution
    Link to Kobe Univ. Repository (Kernel)

  • Zenzo Yamaguchi, Kimihiro Sakagami, Masayuki Morimoto, J. Stuart Bolton, Ichiro Yamagiwa
    2012, Acoustical Science and Technology, 33(1) (1), 56 - 58, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • An experimental study on a cylindrical microperforated panel space sound absorber
    Kimihiro Sakagami, Takayuki Oshitani, Motoki Yairi, Emi Toyoda, Masayuki Morimoto
    Jan. 2012, NOISE CONTROL ENGINEERING JOURNAL, 60(1) (1), 22 - 28, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • SOUND ABSORPTION CHARACTERISTICS OF A SINGLE MICROPERFORATED PANEL ABSORBER BACKED BY A POROUS ABSORBENT LAYER
    Kimihiro Sakagami, Seiji Kobatake, Ken'ichi Kano, Masayuki Morimoto, Motoki Yairi
    Dec. 2011, ACOUSTICS AUSTRALIA, 39(3) (3), 95 - 100, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Experimental validation of force radiation modes: a novel approach to reduction of sound radiation from vibrating structure
    Yamaguchi Zenzo, Sakagami Kimihiro, Morimoto Masayuki, Bolton J. Stuart
    Sep. 2011, CDROM Proceedings of Inter-Noise 2011 Osaka, English
    International conference proceedings

  • Effect of a honeycomb on the absorption characteristics of double-leaf microperforated panel (MPP) space sound absorbers
    Kimihiro Sakagami, Ippei Yamashita, Motoki Yairi, Masayuki Morimoto
    Jul. 2011, NOISE CONTROL ENGINEERING JOURNAL, 59(4) (4), 363 - 371, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Effect of a honeycomb on the sound absorption characteristics of panel-type absorbers
    Toyoda Masahiro, Sakagami Kimihiro, Takahashi Daiji, Morimoto Masayuki
    Jul. 2011, Applied Acoustics, Vol. 72, pp. 943-948, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Zenzo Yamaguchi, J. Stuart Bolton, Kimihiro Sakagami
    Jun. 2011, Applied Acoustics, 72(7) (7), 420 - 427, English
    [Refereed]
    Scientific journal

  • Excess sound absorption in the normal incidence obtained by two microperforated panel absorbers with different impedance
    Motoki Yairi, Kimihiro Sakagami, Kenichi Takebayashi, Masayuki Morimoto
    2011, 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011, 3, 1966 - 1973, English
    International conference proceedings

  • Sound absorption characteristics of a double-leaf structure composed of a microperforated panel (MPP) and a permeable membrane with a porous layer
    Sakagami Kimihiro, Kobatake Seiji, Morimoto Masayuki
    神戸大学大学院工学研究科, 2011, Memoirs of the Graduate School of Engineering, Kobe University, 第3号,10～15頁, 10 - 15, Japanese
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Tomohito Nakamori, Masayuki Morimoto, Motoki Yairi
    2011, Acoustical Science and Technology, 32(1) (1), 47 - 49, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Motoki Yairi, Kimihiro Sakagami, Kenichi Takebayashi, Masayuki Morimoto
    2011, Acoustical Science and Technology, 32(5) (5), 194 - 200, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Motoki Yairi, Kimihiro Sakagami, Kenichi Takebayashi, Masayuki Morimoto
    2011, Acoustical Science and Technology, 32(5) (5), 194 - 200, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • MULTIPLE-LEAF SOUND ABSORBERS WITH MICROPERFORATED PANELS: AN OVERVIEW
    Kimihiro Sakagami, Motoki Yairi, Masayuki Morimoto
    Aug. 2010, ACOUSTICS AUSTRALIA, 38(2) (2), 76 - 81, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Reduction of sound radiation by using force radiation modes: Effects of attached mass on force radiation modes
    YAMAGUCHI Zenzo, NAKAHIRA Wataru, SAKAGAMI Kimihiro, MORIMOTO Masayuki, BOLTON Stuart J, YAMAGIWA Ichiro
    Jun. 2010, CD-ROM Proceedings of Inter-Noise 2010, Paper ID: 534, English
    Scientific journal

  • Multiple-leaf sound absorbers with microperforated panels: An overview
    SAKAGAMI Kimihiro, YAIRI Motoki, MORIMOTO Masayuki
    Jun. 2010, CD-ROM Proceedings of Inter-Noise 2010, Paper ID: 89, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Kiyotaka Matsutani, Masayuki Morimoto
    May 2010, APPLIED ACOUSTICS, 71(5) (5), 411 - 417, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Sound absorption characteristics of a honeycomb-backed microperforated panel absorber: Revised theory and experimental validation
    SAKAGAMI Kimihiro, YAMASHITA Ippei, YAIRI Motoki, MORIMOTO Masayuki
    Apr. 2010, Noise Control Engineering Journal, Vol. 58, No. 2, pp. 157-162, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • 防音扉による低周波音の遮音特性に関する基礎的研究
    SAKAGAMI Kimihiro, KASHITANI Akihiko, MORIMOTO Masayuki, TAKADA Shigetaka
    神戸大学大学院工学研究科, Mar. 2010, 神戸大学大学院工学研究科紀要, 第1号,pp.22-28, 22 - 28, Japanese
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Sound absorption characteristics of a microperforated panel absorber backed by an absorbent layer
    SAKAGAMI Kimihiro, KANO Kenichi, MORIMOTO Masayuki, YAIRI Motoki
    神戸大学大学院工学研究科, 2010, MEMOIRS OF THE GRADUATE SCHOOLS OF ENGINEERING AND SYSTEM INFORMATICS, 第2号,pp.14-19, 14 - 19, Japanese
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • 多孔質吸音材の吸音特性に対する表面保護フィルムの影響
    SAKAGAMI Kimihiro, NISHIO Junko, MORIMOTO Masayuki
    Sep. 2009, 神戸大学都市安全研究センター研究報告, 第13号,pp211-218, Japanese
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Masayuki Morimoto, Kimihiro Sakagami, Noboru Nakajima, Zenzo Yamaguchi, Kazutoshi Michishita
    Sep. 2009, Applied Acoustics, 70(9) (9), 1143 - 1147, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Effect of a membrane attached to a microperforated panel absorber on its sound absorptiriby; Possibility of adjusting the acoustic properties of a microperforated panel by covering materials
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, NISHIO Junko, YAIRI Motoki
    Sep. 2009, 神戸大学都市安全研究センター研究報告, 第13号,pp.219-226, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Masayuki Morimoto, Motoki Yairi
    Aug. 2009, Applied Acoustics, 70(8) (8), 1131 - 1136, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Wideband sound absorber obtained by combination of two microperforated panel absorbers with different air-cavity depths arranged in parallel
    YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Aug. 2009, CD-ROM Proceedings of Inter-Noise 2009 (Ottawa, Canada), English
    Scientific journal

  • Sound absorption characteristics of a honeycomb-backed microperforated panel absorber: revised theory and experimental validation
    SAKAGAMI Kimihiro, YAIRI Motoki, MORIMOTO Masayuki
    Aug. 2009, CD-ROM Proceedings of Inter-Noise 2010 (Ottawa, Canada), English
    Scientific journal

  • Double-leaf microperforated panel space absorbers: A revised theory and detailed analysis
    SAKAGAMI Kimihiro, NAKAMORI Tomohito, MORIMOTO Masayuki, YAIRI Motoki
    Jan. 2009, Applied Acoustics, Vol.70 , pp.703-709, 703 - 709, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Yoshiki Nagayama, Masayuki Morimoto, Motoki Yairi
    2009, Acoustical Science and Technology, 30(2) (2), 154 - 156, English
    [Refereed]
    Scientific journal

  • Kimihiro Sakagami, Keishi Yoshida, Masayuki Morimoto
    2009, Acoustical Science and Technology, 30(5) (5), 390 - 392, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Effect of an elastic support on the sound absorption characteristics of microperforated panel absorbers
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    Sep. 2008, 神戸大学都市安全研究センター研究報告, 12, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Application of microperforated panel absorbers to room interior surfaces
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    Sep. 2008, International Journal of Acoustics and Vibration, 13 (3) 120-124, English
    [Refereed]
    Scientific journal

  • Kimihiro Sakagami, Masayuki Morimoto, Motoki Yairi, Atsuo Minemura
    Feb. 2008, APPLIED ACOUSTICS, 69(2) (2), 179 - 182, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Double-leaf microperforated panel space absorbers: A revised theory and detailed analysis
    Sakagami, Kimihiro, Nakamori, Tomohito, Morimoto, Masayuki, Yairi, Motoki
    Sep. 2007, CD-ROM Proceedings of 19th International Congress on Acoustics, CD-ROM (invited paper), English
    Scientific journal

  • Double-leaf microperforated panel space absorbers: An experimental study for further improvement
    Yairi, Motoki, Sakagami, Kimihiro, Morimoto, Masayuki
    Sep. 2007, CD-ROM Proceedings of 19th International Congress on Acoustics, CD-ROM (invited paper), English
    International conference proceedings

  • Recent developments in applications of microperforated panel absorbers
    Sakagami, Kimihiro, Morimoto, Masayuki, Motoki, Yairi
    Jul. 2007, CD-ROM Proceedings of 14th International Congress on Sound and Vibration, CD-ROM (Keynote paper), English
    Scientific journal

  • A basic study on the analysis of the sound field around an axial symmetric obstacle by boundary expansion method
    Tanigawa, Masaki, Fukuwaka, Naoko, Matsuura, Yukiko, Sakagami, Kimihiro, Morimoto, Masayuki
    神戸大学, Mar. 2007, Memoirs of Graduate School of Science and Technology Kobe University （B), 25-B, 21-29, 21 - 29, Japanese
    [Refereed]
    Scientific journal

  • Sound absorption characteristics of a panel absorber with an air-back cavity of non-uniform depth
    Sakagami, Kimihiro, Morimoto, Masayuki
    Kobe University, Mar. 2007, Memoirs of Graduate School of Science and Technology Kobe University, 25-A, 25-31, 25 - 31, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Yukiko Matsuura, Masayuki Morimoto, Kimihiro Sakagami, Masaki Tanigawa
    Oct. 2006, Applied Acoustics, 67(10) (10), 982 - 995, English
    [Refereed]
    Scientific journal

  • K Sakagami, M Morimoto, W Koike
    Jul. 2006, APPLIED ACOUSTICS, 67(7) (7), 609 - 619, English
    [Refereed]
    Scientific journal

  • Application of microperforated panels to room interior surfaces: An overview
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki, MINEMURA Atsuo
    Jun. 2006, CD-ROM Proceedings of WESPAC IX, Seoul, Korea, pp. 1-6, English
    International conference proceedings

  • K Sakagami, T Uyama, M Morimoto, M Kiyama
    Jun. 2005, APPLIED ACOUSTICS, 66(6) (6), 653 - 668, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • KONNO Yoshisato, SAKAGAMI Kimihiro, YAMAMOTO Minoru, YAMAMOTO Kohei
    Bridges are mainly made of two types plate component, slab and girder. Such components are vibrated by road traffic, and radiate structure borne sound. In this paper calculation methods for the structure borne sound are derived by the theory of thin plate vibration. Test-run of heavy trucks on different type bridges and vibration force measurement with hammer impact on bridge surface are carried out. From those tests the vibration force caused by traffic is estimated. With the aid of the vibration force and the calculation formulas, the radiated sound is calculated. Also we compared the calculated results with measured sound and could explain the sound field with this method. It is shown that a good agreement is obtained between the theoretically predicted value and the measured one.
    Japan Society of Civil Engineers, Apr. 2005, Journals of the Japan Society of Civil Engineers, 787/I-71, 105-115(787) (787), 105 - 115, Japanese
    [Refereed]
    Scientific journal

  • Kimihiro Sakagami, Masayuki Morimoto, Motoki Yairi
    Mar. 2005, Acoustical Science and Technology, 26(2) (2), 204 - 207, English
    [Refereed]
    International conference proceedings

  • Acoustical properties of microperforated panel absorbers with various configurations of the back cavity
    Motoki Yairi, Kimihiro Sakagami, Masayuki Morimoto, Atsuo Minemura
    2005, 12th International Congress on Sound and Vibration 2005, ICSV 2005, 1, 339 - 346, English
    International conference proceedings

  • Sakamoto Shinichi, Sakagami Kimihiro, Hanyu Toshiki
    Acoustical Society of Japan, 2005, Acoustical science and technology, 26(2) (2), 89 - 89, English

  • Theoretical analysis of an acoustic gain by a stage riser with perildic ribs
    NAKANISHI Shinsuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 2004, CD-ROM Proceedings of The 18th International Symposium on Room Acoustics;Design&Science 2004(RADS2004),Awaji,Japan, 27, 525 - 528, English
    [Refereed]
    International conference proceedings

  • Effect of constructions on an acoustic gain by a stage riser
    NAKANISHI Shinsuke, MORIMOTO Masayuki, SAKAGAMI Kimihiro
    2004, CD-ROM Proceedings of The 18th International Congress on Acoustics,Kyoto,Japan, We2.B2.3, English
    [Refereed]
    International conference proceedings

  • Effect of a mecroperforated panel inside the cavity on structure-borne sound radiation from a double-leaf structure(invited paper)
    YAIRI Motok, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    2004, CD-ROM Proceedings of The 18th International Congress on Acoustics,Kyoto,Japan, Tu5.B2.1, English
    [Refereed]
    International conference proceedings

  • Detailed analysis of the effect of vibration of a microperforated panel on its sound absorption characteristics
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    2004, CD-ROM Proceedings of The 18th International Symposium on Room Acoustics;Design&Science 2004(RADS2004),Awaji,Japan, English
    [Refereed]
    International conference proceedings

  • A basic study on double-leaf microperfonated panel absorbers
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, KOIKE Wakana
    2004, CD-ROM Proceedings of The 18th International Congress on Acoustics,Kyoto,Japan, We.P2.16, English
    [Refereed]
    International conference proceedings

  • Motoki Yairi, Kimihiro Sakagami, Masayuki Morimoto, Atsuo Minemura, Kei Andow
    Apr. 2003, Applied Acoustics, 64(4) (4), 365 - 384, English
    [Refereed]
    Scientific journal

  • Effects of acoustical damping with a microperforated panel to reduce the structure-borne sound radiation from a double-leaf structure.
    YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    2003, CD-ROM Proceedings of International Conference on Sound and Vibration(ICSV10), 未記入, English
    Scientific journal

  • Sound field radiated by infinitely long elastic plate strips placed in parallel.
    MICHISHITA K, YAMAGUCHI Z, NAKAJIMA N, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Kobe University, 2003, Memoirs of the faculty of engineering, Kobe University., 50,27-36, 27 - 35, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Membranes and membrane structures for acoustical applications: an overview.
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, KIYAMA Masakazu
    2003, CD-ROM Proceedings of The Eighth Western Pacific Acoustics Conference, MC44, English
    International conference proceedings

  • Masayuki Morimoto, Masakazu Kiyama, Kimihiro Sakagami
    Aug. 2002, Applied Acoustics, 63(8) (8), 911 - 926, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kei Andow, Atsuo Minemura, Masayuki Morimoto, Eiji Sakagami, Kimihiro Sakagami, Motoki Yairi
    Jul. 2002, Applied Acoustics, 63(7) (7), 737 - 757, English
    [Refereed]
    Scientific journal

  • On the dissipation of acoustic energy in a thin, infinite, poroelastic plate
    KV Horoshenkov, K Sakagami, M Morimoto
    Jul. 2002, ACTA ACUSTICA UNITED WITH ACUSTICA, 88(4) (4), 500 - 506, English
    [Refereed]
    Scientific journal

  • Zihou Meng, Kimihiro Sakagami, Masayuki Morimoto, Guoan Bi, Kot Chichung Alex
    Mar. 2002, IEEE Transactions on Speech and Audio Processing, 10(3) (3), 167 - 172, English
    [Refereed]
    Scientific journal

  • Mizutani Koichi, Sakagami Kimihiro
    Acoustical Society of Japan, 2002, Acoustical science and technology, 23(1) (1), 28 - 28, English

  • The role of reflections from behind the listener in spatial impression
    M Morimoto, K Iida, K Sakagami
    Feb. 2001, APPLIED ACOUSTICS, 62(2) (2), 109 - 124, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Kimihiro Sakagami, Toru Uyama, Masayuki Morimoto, Masakazu Kiyama
    2000, Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi), 21(2) (2), 107 - 109, English
    [Refereed]
    Scientific journal

  • Kazutoshi Michishita, Kimihiro Sakagami, Masayuki Morimoto, U.Peter Svensson
    Elsevier Science Ltd, 2000, Applied Acoustics, 61(1) (1), 45 - 63, English
    [Refereed]
    Scientific journal

  • Kazutoshi Michishita, Zenzo Yamaguchi, Kimihiro Sakagami, Masayuki Morimoto
    Elsevier Ltd, 2000, Applied Acoustics, 61(4) (4), 413 - 425, English
    [Refereed]
    Scientific journal

  • M. Morimoto, M. Daido, K. Sakagami, S. Nakanishi
    May 1999, Applied Acoustics, 57(1) (1), 17 - 27, English
    [Refereed]
    Scientific journal

  • M Morimoto, M Daido, K Sakagami, S Nakanishi
    Apr. 1999, Applied Acoustics, 56(4) (4), 241 - 256, English
    [Refereed]
    Scientific journal

  • D. Takahashi, M. Morimoto, M. Daido, S. Nakanishi, K. Sakagami
    Dec. 1998, Applied Acoustics, 55(4) (4), 253 - 273, English
    [Refereed]
    Scientific journal

  • A basic study on acoustic properties of double-leaf membranes
    M Kiyama, K Sakagami, M Tanigawa, M Morimoto
    Jul. 1998, APPLIED ACOUSTICS, 54(3) (3), 239 - 254, English
    [Refereed]
    Scientific journal

  • Daiji Takahashi, Masayuki Morimoto, Masakazu Kiyama, Kimihiro Sakagami
    Jun. 1998, Applied Acoustics, 54(2) (2), 93 - 111, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Reflection of a Spherical Sound Wave by an Infinite Elastic Plate with an Air-Back Cavity
    K. Sakagami, S. Nakanishi, M. Daido, M. Morimoto, D. Takahashi
    Nov. 1997, Acustica, 83(6) (6), 963 - 971, English
    Scientific journal

  • Sound absorption of a cavity-backed membrane: A step towards design method for membrane-type absorbers
    K Sakagami, M Kiyama, M Morimoto, D Takahashi
    Nov. 1996, APPLIED ACOUSTICS, 49(3) (3), 237 - 247, English
    [Refereed]
    Scientific journal

  • Acoustic properties of permeable membranes
    D Takahashi, K Sakagami, M Morimoto
    May 1996, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 99(5) (5), 3003 - 3009, English
    [Refereed]
    Scientific journal

  • Acoustic properties of an infinite elastic plate backed by multiple layers
    K Sakagami, H Gen, M Morimoto, D Takahashi
    Jan. 1996, ACUSTICA, 82(1) (1), 45 - 53, English
    [Refereed]
    Scientific journal

  • Effect of permeability on acoustic properties of double-leaf membranes
    M Kiyama, K Sakagami, M Morimoto
    1996, INTER-NOISE 96 - THE 1996 INTERNATIONAL CONGRESS ON NOISE CONTROL ENGINEERING, 25TH ANNIVERSARY CONGRESS - LIVERPOOL, PROCEEDINGS, BOOKS 1-6, 955 - 958, English
    [Refereed]
    International conference proceedings

  • A basic study on acoustic properties of double-leaf membranes
    K Sakagami, M Kiyama, M Tanigawa, M Morimoto
    1996, INTER-NOISE 96 - THE 1996 INTERNATIONAL CONGRESS ON NOISE CONTROL ENGINEERING, 25TH ANNIVERSARY CONGRESS - LIVERPOOL, PROCEEDINGS, BOOKS 1-6, 931 - 934, English
    [Refereed]
    International conference proceedings

  • Sound absorption of layered structures with permeable membranes
    D TAKAHASHI, K SAKAGAMI, M MORIMOTO
    1995, ICA 95 - PROCEEDINGS OF THE 15TH INTERNATIONAL CONGRESS ON ACOUSTICS, VOL II, 2, 673 - 676, English
    International conference proceedings

  • Kimihiro Sakagami, Masayuki Morimoto, Daiji Takahashi
    1995, Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi), 16(2) (2), 71 - 76, English
    [Refereed]
    Scientific journal

  • Kimihiro Sakagami, Masayuki Morimoto, Daiji Takahashi
    1993, Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi), 14(2) (2), 85 - 90, English
    [Refereed]
    Scientific journal

■ MISC
  • 不均質MPPと異形孔MPP
    阪上公博
    Lead, Mar. 2025, 音響技術, (209) (209), 47 - 51, Japanese
    [Invited]
    Introduction scientific journal

  • 吸音材料の変遷ー次世代吸音材とその後の展開ー
    阪上公博
    Lead, Dec. 2022, 音響技術, (200) (200), 25 - 30, Japanese
    [Invited]
    Introduction scientific journal

  • A basic study on the application of plenum structure to a door
    SAKAGAMI Kimihiro
    Lead, Jun. 2022, 音響技術, (198) (198), 76 - 79, Japanese
    [Invited]
    Introduction scientific journal

  • Acoustic environment in a residential area during the state of emergency (April-May 2020)
    Kimihiro Sakagami
    Lead, Dec. 2021, 騒音制御, 45(6) (6), 259 - 262, Japanese
    [Invited]
    Introduction scientific journal

  • プレナム構造のドアへの適用に関する簡易実験
    阪上公博, 奥園健
    Lead, Mar. 2020, 神戸大学大学院工学研究科・システム情報学研究科紀要, (12) (12), Japanese
    [Invited]
    Introduction research institution

  • グラフィクスリテラシー教育研究センター設立の趣旨
    鈴木広隆, 阪上公博
    Last, Mar. 2020, 神戸大学大学院工学研究科・システム情報学研究科紀要, (12) (12), Japanese
    [Invited]
    Introduction research institution

  • Social Distanceを保つための公開コンペ「はなれてつなぐ」について
    鈴木広隆, 多賀謙蔵, 阪上公博
    Last, Mar. 2020, 神戸大学大学院工学研究科・システム情報学研究科紀要, (12) (12), Japanese
    [Invited]
    Introduction research institution

  • Some examples of usage of microperforated panel absorbers
    SAKAGAMI Kimihiro
    Dec. 2019, Architectural acoustics and noise control, (188) (188), 1 - 7, Japanese
    [Refereed][Invited]
    Introduction scientific journal

  • Acoustical materials and backing structure
    SAKAGAMI KIMIHIRO
    Acoustical Society of Japan, Aug. 2018, Journal of the Acoustical Society of Japan, 74(8) (8), 448 - 455, Japanese
    [Refereed][Invited]
    Introduction scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Implementation experiment of a honeycomb-backed MPP sound absorbing system in a meeting room
    SAKAGAMI KIMIHIRO, 矢入 幹記, 奥園 健, 羽入 敏樹, 星 和磨, 原田 慎史, 高橋 誠治, 上田 泰孝
    日本音響材料協会, Jun. 2017, Architectural acoustics and noise control, 46(178) (178), 58 - 62, Japanese
    [Refereed]
    Report scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Resonator type sound absorbing system
    SAKAGAMI Kimihiro
    共鳴器型吸音機構について，筆者の最新の研究成果も交えて総説した．
    日本音響材料協会, Mar. 2017, Architectural acoustics and noise control, 46(177) (177), 15 - 20, Japanese
    [Invited]
    Introduction scientific journal

  • Tips for the application of smartphones to acoustics measurements
    SAKAGAMI KIMIHIRO, SATOH FUMIAKI, OMOTO AKIRA
    日本音響材料協会, Mar. 2016, Architectural acoustics and noise control, 45(173) (173), 44 - 47, Japanese
    [Invited]
    Introduction scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Space sound absorbers with a microperforated panel (MPP)
    阪上 公博, 矢入 幹記, 豊田 政弘
    日本騒音制御工学会, Sep. 2015, 公益社団法人日本騒音制御工学会秋季研究発表会講演論文集 = Proceedings of the autumn meeting, the Institute of Noise Control Engineering of Japan, 115 - 118, Japanese

  • Applications of the next-generation sound absorbing materials : Microperforated panels (MPP) and permeable membranes
    阪上 公博, 矢入 幹記
    日本騒音制御工学会, Sep. 2014, 公益社団法人日本騒音制御工学会秋季研究発表会講演論文集 = Proceedings of the autumn meeting, the Institute of Noise Control Engineering of Japan, 101 - 104, Japanese

  • Absorption characteristics of a microperforated panel absorber and increasing its absorption frequency range
    矢入 幹記, 阪上 公博
    日本騒音制御工学会, Sep. 2014, 公益社団法人日本騒音制御工学会秋季研究発表会講演論文集 = Proceedings of the autumn meeting, the Institute of Noise Control Engineering of Japan, 105 - 108, Japanese

  • Effect of a Porous Absorbent Layer on Absorption Characteristics of a Double-Leaf MPP Space Absorber
    OKANO Mitsuru, SAKAGAMI Kimihiro
    Architectural Institute of Japan, 24 May 2013, 日本建築学会近畿支部研究報告集. 環境系, (53) (53), 69 - 72, Japanese

  • Membrane-type Sound Absorbers and Double-leaf Permeable Membrane Space Sound Absorbers
    阪上 公博
    日本騒音制御工学会, Aug. 2012, 騒音制御, 36(4) (4), 254 - 258, Japanese

  • 4017 Evaluation of sound radiation using force radiation modes for a sound field with a reflecting surface
    ISHIBASHI Shinji, YAMAGUCHI Zenzo, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2012, 日本建築学会近畿支部研究報告集. 環境系, (52) (52), 65 - 68, Japanese

  • 4006 An Experimental Study on Sound Absorption Characteristic of Cylindrical MPP Space Absorber with Core
    FUJITA Shota, SAKAGAMI Kimihiro, YAIRI Motoki, TOYODA Emi, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2012, 日本建築学会近畿支部研究報告集. 環境系, (52) (52), 21 - 24, Japanese

  • 4004 A basic study on the sound transmission of a spherical wave through an elastic plate
    TSUKAMOTO Yohei, SAKAGAMI Kimihiro, YAIRI Motoki, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2012, 日本建築学会近畿支部研究報告集. 環境系, (52) (52), 13 - 16, Japanese

  • 4016 Evaluation of Sound Radiation Using Extended Radiation Modes for a multiple element vibration structure
    MIURA Shuhei, YAMAGUCHI Zenzo, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2011, 日本建築学会近畿支部研究報告集. 環境系, (51) (51), 61 - 64, Japanese

  • 4008 Sound absorption characteristics of a double-leaf structure composed of an MPP and a permeable membrane with a porous layer
    KOBATAKE Seiji, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2011, 日本建築学会近畿支部研究報告集. 環境系, (51) (51), 29 - 32, Japanese

  • Devices for improving speech transmission performance - Next generation sound absorbing materials: Microperforated panels and polyester nonwovens -
    SAKAGAMI Kimihiro, FUJIMOTO Kazutoshi
    Jul. 2009, Journal of INCE/J, Vol. 33, No. 4, pp. 307-316, Japanese
    [Invited]
    Introduction scientific journal

  • Chladni Patterns
    SAKAGAMI Kimihiro
    Jun. 2009, Journal of Acoustical Society of Japan (J), Vol. 65, No. 6, p.337, Japanese
    [Invited]
    Introduction scientific journal

  • 4001 Analysis of the sound absorption characteristics of a double-leaf structure consisted of an MPP and a permeable membrane
    FUKUTANI Yusaku, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 22 May 2009, 日本建築学会近畿支部研究報告集. 環境系, (49) (49), 1 - 4, Japanese

  • Kobe Science Museum
    SAKAGAMI Kimihiro
    The Acoustical Society of Japan (ASJ), Dec. 2008, Journal of Acoustical Society of Japan (J), 64 (12) 736(12) (12), 736 - 736, Japanese
    [Invited]
    Introduction scientific journal

  • 4016 A basic study on wideband sound absorbers with a combination of MPP absorber and panel absorption
    KONDO Maiko, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2008, 日本建築学会近畿支部研究報告集. 環境系, (48) (48), 61 - 64, Japanese

  • 4007 A Study on sound absorption characteristics of a honeycomb-backed double MPP absorber
    YAMASHITA Ippei, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2008, 日本建築学会近畿支部研究報告集. 環境系, (48) (48), 25 - 28, Japanese

  • 4005 Sound absorption of a double-leaf microperforated-panel with an air-back cavity : Detailed discussion with a strict theory
    MATSUTANI Kiyotaka, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2008, 日本建築学会近畿支部研究報告集. 環境系, (48) (48), 17 - 20, Japanese

  • 4013 A basic study on wideband sound absorbers with a combination of MPP absorber and porous absorber
    OKAMOTO Naoko, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2008, 日本建築学会近畿支部研究報告集. 環境系, (48) (48), 49 - 52, Japanese

  • Speaking tubes
    SAKAGAMI Kimihiro
    The Acoustical Society of Japan (ASJ), Apr. 2008, Journal of Acoustical Society of Japan (J), 64 (4) 261(4) (4), 261 - 261, Japanese
    [Invited]
    Introduction scientific journal

  • Ringve Museum
    Sakagami, Kimihiro
    The Acoustical Society of Japan (ASJ), Feb. 2008, Journal of the Acoustical Society of Japan, Vol. 64, No. 2, p.125(2) (2), 125 - 125, Japanese
    [Invited]
    Introduction scientific journal

  • 4008 A basic study on wideband sound absorbers with a combination of two MPP absorbers
    NAGAYAMA Yoshiki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 22 May 2007, 日本建築学会近畿支部研究報告集. 環境系, (47) (47), 29 - 32, Japanese

  • Parabolic sound reflectors
    Sakagami, Kimihiro
    The Acoustical Society of Japan (ASJ), Apr. 2007, Journal of the Acoustical Society of Japan, Vol. 63, No. 4, p.239(4) (4), 239 - 239, Japanese
    [Invited]
    Introduction scientific journal

  • Absorption properties of microperforated panel absorber
    YAIRI Motoki, SAKAGAMI Kimihiro
    The Acoustical Society of Japan (ASJ), Feb. 2007, Journal of the Acoustical Society of Japan, 63 (2)(2) (2), 76 - 82, Japanese
    [Invited]
    Introduction scientific journal

  • 4013 A basic study on the sound field analysis of periodic structures : Applicability of the analysis method using the periodic boundary condition
    FUKUWAKA Naoko, TANIGAWA Masaki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2006, 日本建築学会近畿支部研究報告集. 環境系, (46) (46), 49 - 52, Japanese

  • 4016 A basic study on the analysis of sound fields around periodic structures : Boundary integral equation analysis using the Green function for a periodic boundary condition
    MATSUURA Yukiko, TANIGAWA Masaki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 23 May 2005, 日本建築学会近畿支部研究報告集. 環境系, (45) (45), 61 - 64, Japanese

  • A note on the measurements of physical measures for room acoustics evaluation : Current issues and perspective
    HANYU Toshiki, SAKAGAMI Kimihiro, SAKAMOTO Shinichi
    The Acoustical Society of Japan (ASJ), 25 Dec. 2004, The Journal of the Acoustical Society of Japan, 61(1) (1), 50 - 55, Japanese

  • 4005 A basic study on the absorption characteristics of a double-leaf microperforated panel with a rigid back wall : The effect of backing structure
    NAKAJIMA Kosuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 24 May 2004, 日本建築学会近畿支部研究報告集. 環境系, (44) (44), 17 - 20, Japanese

  • Effects of periodic ribs on an acoustical gain by a stage riser
    NAKANISHI S., SAKAGAMI K., MORIMOTO M.
    17 Mar. 2004, 日本音響学会研究発表会講演論文集, 2004(1) (1), 833 - 834, Japanese

  • Effect of impervious films on the absorption characteristics of porous absorbent materials
    SAKAGAMI Kimihiro, NISHIO Junko, MORIMOTO Masayuki
    17 Sep. 2003, 日本音響学会研究発表会講演論文集, 2003(2) (2), 885 - 886, Japanese

  • 多孔質吸音材による固体音の放射制御
    矢入 幹記, 阪上 公博, 森本 政之
    鹿島技術研究所, Sep. 2003, 鹿島技術研究所年報, 51, 129 - 134, Japanese

  • 4009 Effect of Impervious Films on Absorption Characteristics of a Porous Sound Absorbent
    NISHIO Junko, SAKAGAM Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 26 May 2003, 日本建築学会近畿支部研究報告集. 環境系, (43) (43), 33 - 36, Japanese

  • 4023 A basic study on absorption characteristics of double-leaf permeable membranes
    EYAMA Mai, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 26 May 2003, 日本建築学会近畿支部研究報告集. 環境系, (43) (43), 89 - 92, Japanese

  • Sound insulation performance of porous ceramic sound absorbent panels(SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING ARCHITECTURAL INSTITUTE OF JAPAN 2002)
    KASHIWAGI Takao, KITAYAMA Satoru, ODA Kazuo, MIYAO Nobuaki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 30 Jun. 2002, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 2002, 127 - 128, Japanese

  • Effects of surface absorption of steel plate girders on the elevated structure noise
    NAKAJIMA Noboru, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MICHISHITA Kazutoshi
    Architectural Institute of Japan, 24 May 2002, 日本建築学会近畿支部研究報告集. 環境系, (42) (42), 209 - 212, Japanese

  • The reduction effect of a dynamic absorber on the structure-bome sound radiation from a double-leaf wall : A simplified analysis with one-dimensional piston vibration model
    KOIKE Wakana, YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    Architectural Institute of Japan, 24 May 2002, 日本建築学会近畿支部研究報告集. 環境系, (42) (42), 125 - 128, Japanese

  • Effect of an interior wall on the structure-borne sound radiation from walls : Effects of a stud and its vibration isolation on the structure-borne sound radiation from double-leaf walls
    SAKAGAMI Eiji, YAIRI Motoki, SAKAGAMI Kimihiro, FUJIWARA Hiroko, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    Architectural Institute of Japan, 24 May 2002, 日本建築学会近畿支部研究報告集. 環境系, (42) (42), 141 - 144, Japanese

  • The vibration and sound radiation of a stage floor in concert auditoria
    SAKAGAMI Kimihiro
    The Acoustical Society of Japan (ASJ), 25 Dec. 2001, The Journal of the Acoustical Society of Japan, 58(1) (1), 46 - 53, Japanese

  • A study on countermeasure for the elevated structure noise - Effect of an adjacent plate girder on the sound field and noise reduction effect of surface absorption of the plate girder -
    MICHISHITA K., YAMAGUCHI Z., SAKAGAMI K., MORIMOTO M.
    01 Oct. 2001, 日本音響学会研究発表会講演論文集, 2001(2) (2), 815 - 816, Japanese

  • Experimental study on the structure-borne sound radiation of a double-leaf wall
    YAIRI M., MINEMURA A., ANDOW K., SAKAGAMI K., MORIMOTO M.
    01 Oct. 2001, 日本音響学会研究発表会講演論文集, 2001(2) (2), 933 - 934, Japanese

  • Acoustic properties of a triple-leaf membrane: Effect of the arrangement of a permeable leaf
    SAKAGAMI K., MORIMOTO M., KIYAMA M.
    01 Oct. 2001, 日本音響学会研究発表会講演論文集, 2001(2) (2), 943 - 944, Japanese

  • Effect of an Interior-Panel on the Structure-Borne Sound Radiation
    Yairi Motoki, Sakagami Kimihiro, Morimoto Masayuki
    鹿島技術研究所, Sep. 2001, Annual report of Kajima Technical Research Institute,Kajima Corporation, 49, 127 - 132, English

  • A basic study on reduction of noise due to electromagnetic vibration
    MICHISHITA Kazutoshi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    01 Aug. 2001, 電気設備学会全国大会講演論文集, 19, 71 - 72, Japanese

  • 4030 The effect of an interior wall on structure-borne sound radiation : The reduction effect of surface absorption and perforated interior walls
    FUJIWARA Hiroko, YAIRI Motoki, SAKAGAMI Kimihiro, SAKAGAMI Eiji, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    Architectural Institute of Japan, 25 May 2001, 日本建築学会近畿支部研究報告集. 環境系, (41) (41), 117 - 120, Japanese

  • 4003 The reduction effect of an absorbent layer in the cavity on the sound radiation from a double-leaf structure
    IIZUKA Mina, YAIRI Motoki, SAKAGAMI Kimihiro, SAKAGAMI Eiji, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    Architectural Institute of Japan, 25 May 2001, 日本建築学会近畿支部研究報告集. 環境系, (41) (41), 9 - 12, Japanese

  • 4023 Effects of directivity of periodic ribs on acoustic properties of a stage floor
    NAKANISHI Shinsuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2001, 日本建築学会近畿支部研究報告集. 環境系, (41) (41), 89 - 92, Japanese

  • A basic study on the reduction effect of the structure-borne sound radiation from a double-leaf plate
    YAIRI M., SAKAGAMI K., MORIMOTO M., SAKAGAMI E., MINEMURA A., ANDOW K.
    01 Mar. 2001, 日本音響学会研究発表会講演論文集, 2001(1) (1), 815 - 816, Japanese

  • A Simplified Analysis of the sound radiation from a double-leaf structure with a one-dimensional piston vibration model
    Sakagami Kimihiro, Yairi Motoki, Morimoto Masayuki[et al.]
    Kobe University, Nov. 2000, Memoirs of the Faculty of Engineering, Kobe University, 47, 37 - 50, English

  • Effects of periodic ribs on acoustic properties of a stage floor -Theoretical analysis of a sound field reflected by an elastic ribbed plate with an air back cavity-
    NAKANISHI S., SAKAGAMI K., MORIMOTO M.
    01 Sep. 2000, 日本音響学会研究発表会講演論文集, 2000(2) (2), 803 - 804, Japanese

  • Variation of sound radiation reduction of an interior wall of double-leaf constructions due to excitation condition and parameters of structural wall
    YAIRI M., SAKAGAMI K., MORIMOTO M., SAKAGAMI E., MINEMURA A., ANDOW K.
    01 Sep. 2000, 日本音響学会研究発表会講演論文集, 2000(2) (2), 711 - 712, Japanese

  • Effect of a suspended barrier on the elevated structure noise
    MICHISHITA K., YAMAGUCHI Z., NAKAJIMA N., SAKAGAMI K., MORIMOTO M.
    01 Sep. 2000, 日本音響学会研究発表会講演論文集, 2000(2) (2), 579 - 580, Japanese

  • 4014 Effect of a suspended barrier on the elevated structure noise
    NAKAJIMA Noboru, MICHISHITA Kazutoshi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2000, 日本建築学会近畿支部研究報告集. 環境系, (40) (40), 53 - 56, Japanese

  • 4013 A basic study of the effect of interior materials on structure-borne sound : Sound radiation from an unbounded double-leaf elastic plate
    SAKAGAMI Eiji, YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MINEMURA Atsuo, ANDOW Kei
    Architectural Institute of Japan, 25 May 2000, 日本建築学会近畿支部研究報告集. 環境系, (40) (40), 49 - 52, Japanese

  • 4009 Effects of periodic ribs on acoustic properties of a stage floor
    NAKANISHI Shinsuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 2000, 日本建築学会近畿支部研究報告集. 環境系, (40) (40), 33 - 36, Japanese

  • Extrapolation of a Room Impulse Response Using One-Step Method
    MENG Zihou, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    01 Mar. 2000, 日本音響学会研究発表会講演論文集, 2000(1) (1), 547 - 548, English

  • Sound radiation from a double-leaf elastic plate of infinite extent with a point force excitation-A basic study on structure-borne sound radiation from an interior wall-
    YAIRI M., SAKAGAMI K., MORIMOTO M., MINEMURA A., ANDOW K.
    01 Mar. 2000, 日本音響学会研究発表会講演論文集, 2000(1) (1), 757 - 758, Japanese

  • A comparison between a rectangular elastic plate with large aspect ratio and an infinitely long elastic plate strip for the analysis of the radiated sound field
    MICHISHITA K., SAKAGAMI K., MORIMOTO M.
    01 Mar. 2000, 日本音響学会研究発表会講演論文集, 2000(1) (1), 761 - 762, Japanese

  • Effect of vibration on the acoustic properties of porous absorbent layers
    Sakagami Kimihiro, Morimoto Masayuki
    Kobe University, Nov. 1999, Memoirs of the Faculty of Engineering, Kobe University, 46, 33 - 39, English

  • An analysis of sound radiation from an I-shaped girder of motorway -the influence of reflection by a slab-
    MICHISHITA K., YAMAGUCHI Z., SAKAGAMI K., MORIMOTO M.
    01 Sep. 1999, 日本音響学会研究発表会講演論文集, 1999(2) (2), 755 - 756, Japanese

  • Theoretical analysis of the sound field reflected by an elastic circular plate in a rigid baffle.
    NAKANISHI S., SAKAGAMI K., MORIMOTO M.
    01 Sep. 1999, 日本音響学会研究発表会講演論文集, 1999(2) (2), 915 - 916, Japanese

  • Prediction of the absorption characteristics of finite size membrane absorbers.
    KIYAMA M., UYAMA T., SAKAGAMI K., MORIMOTO M.
    01 Sep. 1999, 日本音響学会研究発表会講演論文集, 1999(2) (2), 845 - 846, Japanese

  • Acoustic properties of a triple-leaf membrane:A basic study with a simple model
    SAKAGAMI K., MORIMOTO M., KIYAMA M.
    01 Sep. 1999, 日本音響学会研究発表会講演論文集, 1999(2) (2), 847 - 848, Japanese

  • 4054 Prediction of the absorption characteristics of finite size membrane absorbers
    UAYAMA Toru, SAKAGAMI Kimihiro, MORIMOTO Masayuki, KIYAMA Masakazu
    Architectural Institute of Japan, 25 May 1999, 日本建築学会近畿支部研究報告集. 環境系, (39) (39), 213 - 216, Japanese

  • 4056 Theoretical analysis of acoustic properties of a stage floor modeled by a circular elastic plate
    NAKANISHI Shinsuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 1999, 日本建築学会近畿支部研究報告集. 環境系, (39) (39), 221 - 224, Japanese

  • 4055 Acoustic properties of a triple-leaf membrane : A basic study with a normal incidence model
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, KIYAMA Masakazu
    Architectural Institute of Japan, 25 May 1999, 日本建築学会近畿支部研究報告集. 環境系, (39) (39), 217 - 220, English

  • 4057 Radiated sound field by a girder of an elevated structure : Sound radiation from an unbaffled elastic plate of infinite length
    MICHISHITA Kazutoshi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 1999, 日本建築学会近畿支部研究報告集. 環境系, (39) (39), 225 - 228, Japanese

  • Sound radiation from an elastic plate strip of infinite length -Numerical analysis using the method of equivalent sources-
    MICHISHITA K., SAKAGAMI K., MORIMOTO M., SVENSSON U. Peter
    01 Mar. 1999, 日本音響学会研究発表会講演論文集, 1999(1) (1), 761 - 762, Japanese

  • Acoustic reflection of an elastic plate with periodic ribs and a back cavity
    SAKAGAMI K.
    1999, Acustica/Acta Acustica, 85, 1 - 11

  • 4030 Effects of room surfaces on the radiated sound of a kettledrum. : Numerical analysis with the equivalent source method
    NAKANO Mayumi, Svensson U. Peter, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 1998, 日本建築学会近畿支部研究報告集. 環境系, (38) (38), 117 - 120, Japanese

  • 4024 Absorption characteristics of a permeable double-leaf membrane with an absorptive layer in its cavity
    UYAMA Toru, KIYAMA Masakazu, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 1998, 日本建築学会近畿支部研究報告集. 環境系, (38) (38), 93 - 96, Japanese

  • 4023 Effect of vibration on the acoustic properties of porous absorbent layers
    SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Architectural Institute of Japan, 25 May 1998, 日本建築学会近畿支部研究報告集. 環境系, (38) (38), 89 - 92, English

  • Acoustic properties of membrane structures
    SAKAGAMI Kimihiro
    The Acoustical Society of Japan (ASJ), Jan. 1998, The Journal of the Acoustical Society of Japan, 54(1) (1), 47 - 52, Japanese

  • Experimental sytuy on the acpistic properties of permeable double-leaf members
    KIYAMA Masakazu, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 30 Jul. 1997, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1997, 107 - 108, Japanese

  • Effects of the absorptive cavity on the acoustic properties of the elastoc plate with a point force excitation
    NAKANISHI Shinsuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 30 Jul. 1997, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1997, 105 - 106, Japanese

  • 4001 Some further considerations on the acoustic properties of a permeable membrane
    SAKAGAMI Kimihiro, KIYAMA Masakazu, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 26 May 1997, 日本建築学会近畿支部研究報告集. 環境系, (37) (37), 1 - 4, English

  • 4002 Acoustic properties of a double-leaf membrane with an absorptive layer in its cavity
    UYAMA Toru, KIYAMA Masakazu, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 26 May 1997, 日本建築学会近畿支部研究報告集. 環境系, (37) (37), 5 - 8, Japanese

  • Effects of absorptive layer on acoustic properties of double-leaf membrane structures.
    KIYAMA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Mar. 1997, 日本音響学会研究発表会講演論文集, 1997(2) (2), 889 - 890, Japanese

  • Effects of an absoptive cavity on the acoustic properties of the stage floor
    NAKANISHI S., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Mar. 1997, 日本音響学会研究発表会講演論文集, 1997(2) (2), 861 - 862, Japanese

  • Sound transmission of a single-leaf permeable membrane.
    KIYAMA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Sep. 1996, 日本音響学会研究発表会講演論文集, 1996(2) (2), 791 - 792, Japanese

  • Effect of an excitation force of a musical instrument on a stage floor : Some examples by model analysis with measured excitation force of a violoncello
    NAKANISHI S., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Sep. 1996, 日本音響学会研究発表会講演論文集, 1996(2) (2), 815 - 816, Japanese

  • Experimental study on excitation farce from a violoncello to a stage floor
    NAKAHISHI Shinsuke, DAIDO Masafumi, SAKAGAMI Kimihiro, MORIMOTO Masayuki, KOGA Takashi
    Architectural Institute of Japan, 30 Jul. 1996, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1996, 199 - 200, Japanese

  • Experimental study on the acoustic properties of double-leaf membranes
    KIYAMA Masakazu, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 30 Jul. 1996, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1996, 147 - 148, Japanese

  • 40075 Detailed analysis of acoustic properties of permeable membranes
    SAKAGAMI Kimihiro, KIYAMA Masakazu, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 30 Jul. 1996, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1996, 149 - 150, English

  • Acoustic properties of double-leaf membranes with permeability. -Parametric studies-
    KIYAMA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Mar. 1996, 日本音響学会研究発表会講演論文集, 1996(2) (2), 815 - 816, Japanese

  • Acoustic properties of double-leaf membranes with permeability. -Theoretical considerations-
    KIYAMA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Mar. 1996, 日本音響学会研究発表会講演論文集, 1996(2) (2), 813 - 814, Japanese

  • Acoustic Radiation from a Baffled Elastic Plate Strip of Infinite Length
    Kimihiro Sakagami, Kazutoshi Michishita, masayuki Morimoto, Yasutoshi Kitamura
    Kobe University, 22 Dec. 1995, Memoirs of the Faculty of Engineering, Kobe University, 42, 13 - 27, English

  • Some considerations on sound absorption characteristics of membrane absorbers.
    KIYAMA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Sep. 1995, 日本音響学会研究発表会講演論文集, 1995(2) (2), 819 - 820, Japanese

  • Efects of a point excitation on an infinite elastic plate with a back cavity -A basic study on acoustic properties of stage floors : Part2-
    NAKANISHI S., DAIDO M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Sep. 1995, 日本音響学会研究発表会講演論文集, 1995(2) (2), 879 - 880, Japanese

  • Reflection of a spherical sound wave by a cavity-backed elastic plate with a point force excitation
    NAKANISHI Shinsuke, DAIDO Masafumi, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 20 Jul. 1995, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-1, Environmental engineering I, Room acoustics and acoustic environment noise and solidborne sound environmental vibration light and color water supply and drainage water environment urban installation and environmental management environmental psychology and physiology environmental design electro-magnetic environment, 1995, 7 - 8, Japanese

  • Frequency dependence of auditory source width
    SETOYAMA H., SAKAGAMI K., MORIMOTO M., IIDA K.
    01 Mar. 1995, 日本音響学会研究発表会講演論文集, 1995(1) (1), 853 - 854, Japanese

  • Reflection of a spherical sound wave by an infinite elastic plate with a back cavity
    NAKANISHI S., DAIDO M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D.
    01 Mar. 1995, 日本音響学会研究発表会講演論文集, 1995(1) (1), 765 - 766, Japanese

  • An Analysis of the Acoustic Properties of Double Membrane Structures
    TANIGAWA M., SAKAGAMI K., MORIMOTO M., TAKAHASHI D., KIYAMA M.
    01 Mar. 1995, 日本音響学会研究発表会講演論文集, 1995(1) (1), 807 - 808, Japanese

  • 剛バフル中の有限幅無限長弾性板による反射音場
    阪上 公博, 森本 政之, 高橋 大弐
    神戸大学, 01 Mar. 1995, 神戸大学大学院自然科学研究科紀要. B, 13, 61 - 76, Japanese

  • 弾性板の音響反射特性に関する研究(環境工学)(学位論文要旨)
    阪上 公博
    一般社団法人日本建築学会, 20 Sep. 1994, 建築雑誌. 建築年報, 1994, 130 - 130, Japanese

  • Reflection of a Spherical Sound Wave by an Elastic Plate with Point Force Excitation
    DAIDO Masafumi, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    Architectural Institute of Japan, 25 Jul. 1994, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D, Environmental engineering, 1994, 1771 - 1772, Japanese

  • Accoustic Radiation from an Elastic Plate Strip of Infinite Length
    MICHISHITA Kazutoshi, SAKAGAMI Kimihiro, MORIMOTO Masayuki, KITAMURA Yasutoshi
    Architectural Institute of Japan, 25 Jul. 1994, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D, Environmental engineering, 1994, 1595 - 1596, Japanese

  • Effects of Low Frequency Componets of Reflections on Auditory Source Width
    SETOYAMA Haruki, MORIMOTO Masayuki, SAKAGAMI Kimihiro, IIDA Kazuhiro
    Architectural Institute of Japan, 25 Jul. 1994, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D, Environmental engineering, 1994, 1719 - 1720, Japanese

  • On the numerical analysis of reflected sound field from an elastic plate using finite element and boundary element methods.
    SAKAGAMI Kimihiro, SUGIMOTO Rie, TAKAHASHI Daiji, MORIMOTO Masayuki
    本論文では、定常状態における弾性平面板による反射音場を、有限要素法及び境界要素法を用いて解析する方法について述べ、更に本解析法における板振動に対する音響負荷の取扱いについて検討を行った。その結果、放射音圧を振動方程式に逐次代入する方法により、損失係数が大きい場合には、共振点近傍でも音響負荷を評価できる可能性が示された。数値計算結果からは、板の弾性振動の影響により、板の共振点近傍に反射波のピーク及びディップが現れるだけでなく、共振点近傍以外でも弾性振動の影響が数dBになる場合が見られた。また、板の諸定数(ヤング率、密度、厚さ、損失係数)の変化による影響を明らかにした。
    The Acoustical Society of Japan (ASJ), 01 Nov. 1992, The Journal of the Acoustical Society of Japan, 48(11) (11), 786 - 793, Japanese

  • 4014 A note on the approximation of the acoustic loading for calculation of the reflected field from an elastic plate
    SAKAGAMI Kimihiro
    Architectural Institute of Japan, 02 Jun. 1992, 日本建築学会近畿支部研究報告集. 計画系, (32) (32), 53 - 56, Japanese

  • An analysis on the acoustic reflection by elastic plane plates using finite element and boundary element method
    SAKAGAMI Kimihiro
    Architectural Institute of Japan, 01 Aug. 1991, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D, Environmental engineering, 1991, 349 - 350, Japanese

  • 4002 On the acoustic reflection of an elastic rectangular plane plate : A numerical analysis using finite element and boundary element method
    SUGIMOTO Rie, SAKAGAMI Kimihiro, TAKAHASHI Daiji, MORIMOTO Masayuki, MAEKAWA Zyun-iti
    Architectural Institute of Japan, 07 May 1991, 日本建築学会近畿支部研究報告集. 計画系, (31) (31), 5 - 8, Japanese

  • 4001 An analysis on the acoustic reflection of an elastic plane plate using finite element and boundary element method : Comparison with rigorous solution in two-dimensional sound field
    SAKAGAMI Kimihiro
    Architectural Institute of Japan, 07 May 1991, 日本建築学会近畿支部研究報告集. 計画系, (31) (31), 1 - 4, Japanese

  • 弾性平面板の音響反射特性に関する基礎的考察
    阪上 公博, 前川 純一
    神戸大学, Mar. 1990, 神戸大学大学院自然科学研究科紀要. B, 8, 41 - 48, Japanese

■ Books And Other Publications
  • グラフィカルな表現法による複雑現象の理解
    神戸大学大学院工学研究科グラフィクスリテラシー教育研究センター編
    Joint editor, 編集, 神戸大学出版会, Mar. 2024, ISBN: 9784909364289

  • 建築音響
    阪上, 公博, 豊田, 政弘, 佐藤, 逸人, 羽入, 敏樹, 尾本, 章
    Others, 編集および第3章「音響材料」，「まえがき」, コロナ社, Dec. 2019, Japanese, ISBN: 9784339013634

  • 音響キーワードブック（「吸音材料」の項を担当）
    SAKAGAMI KIMIHIRO
    Others, コロナ社, Feb. 2016, Japanese
    Dictionary or encycropedia

  • 住宅の省エネルギー計画・技術指針（委員会成果報告書）
    Sakagami, Kimihiro
    Joint work, 社団法人空気調和・衛生工学会省エネルギー委員会住宅小委員会, Nov. 2007, Japanese
    Report

  • 建築・環境音響学
    前川, 純一, 森本, 政之, 阪上, 公博
    共立出版, 2000, Japanese, ISBN: 9784320076556

■ Lectures, oral presentations, etc.
  • 異形孔微細穿孔板の吸音特性に関する検討 ー吸音特性の比較と管端補正近似式の適用精度ー
    阿部桜子, 阪上公博
    日本音響学会春季研究発表会, Mar. 2025, Japanese
    Poster presentation

  • プレナムドアの遮音性能向上に関する数値解析的検討－吸音処理とMPPの挿入による効果－
    兒玉和紗, 阪上公博
    日本音響学会秋季研究発表会, Sep. 2024, Japanese
    Poster presentation

  • 数値シミュレーションによる異形孔を有する微細穿孔板の吸音特性に関する検討
    阿部桜子, 阪上公博
    日本音響学会秋季研究発表会, Sep. 2024, Japanese
    Poster presentation

  • 不均一な背後空気層を持つ板振動型吸音体に関する基礎的研究
    千田絢理, 阪上公博
    日本音響学会秋季研究発表会, Sep. 2024, Japanese
    Poster presentation

  • 編物の吸音特性に関する基礎的研究－実験的検討－
    高橋響, 阪上公博
    日本音響学会秋季研究発表会, Sep. 2024, Japanese
    Poster presentation

  • MPPを付加した卓上パーティションの音響特性解析と最適化の試み
    片山開人, 阪上公博, 奥園健
    日本音響学会建築音響研究委員会, May 2023, Japanese
    Oral presentation

  • 並列陽的時間領域 FEM の大規模建築空間のバイノーラル可聴化への応用
    吉田卓彌, 奥園健, 阪上公博
    日本音響学会春季研究発表会, Mar. 2023, Japanese
    Oral presentation

  • クラウドコンピューティングを用いた並列陽的 FEM による室内音響解析
    吉田 卓彌, 奥園 健, 阪上 公博
    日本音響学会秋季研究発表会, Sep. 2022, Japanese
    Oral presentation

  • 意匠性の高い不均質MPP吸音体のデザインに関する基礎的研究
    阪上公博, 草鹿みどり 奥園健
    日本音響学会2022年秋季研究発表会, Sep. 2022, Japanese
    Oral presentation

  • 実験室環境における単板固定窓の遮音性能予測のための有限要素モデリングに関する検討
    三村茉莉絵, 奥園健, 阪上公博
    日本音響学会2022年秋季研究発表会, Sep. 2022, Japanese
    Oral presentation

  • 陽的時間領域有限要素法による大規模室内音響解析
    吉田 卓彌, 奥園 健, 阪上 公博
    日本音響学会建築音響研究委員会, Aug. 2022, Japanese
    Oral presentation

  • FEM による実験室環境における単板固定窓の音響透過損失の予測
    三村 茉莉絵, 奥園 健, 阪上 公博
    日本音響学会建築音響研究委員会, Aug. 2022, Japanese
    [Invited]
    Oral presentation

  • プレナム構造のドアへの適用に関する基礎的検討
    阪上公博, 奥園健, 松村宗一郎
    日本建築学会建築音響研究会, May 2022, Japanese
    Oral presentation

  • 平面波エンリッチメントを用いた FEM による 2 次元室内音響解析手法の頑健性と効率に関する検討
    奥園 健, 向江 俊一, 阪上 公博
    日本音響学会建築音響研究委員会, Apr. 2022, Japanese
    Oral presentation

  • 平面波エンリッチメントを用いたFEMによる2次元室内音響解析手法の頑健性と効率に関する検討
    奥園健, 向江俊一, 阪上公博
    日本建築学会建築音響研究会, Apr. 2022, Japanese
    Oral presentation

  • 実験室における小サイズの固定窓の遮音性能と既存理論による予測
    三村茉莉絵, 塚本陽平, 富川義弘, 奥園健, 阪上公博
    日本建築学会建築音響研究会, Mar. 2022, Japanese
    Oral presentation

  • 大規模室内音響解析のための並列陽的時間領域FEM
    吉田卓彌, 奥園健, 阪上公博
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • 音響材料の波動性を考慮した時間領域FEMによる3次元音響解析－その2 微細穿孔板の拡張作用モデル－
    吉田卓彌, 奥園健, 阪上公博
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • 音響材料の波動性を考慮した時間領域FEMによる3次元音響解析－その1 周波数領域FEMとの比較－
    奥園健, 吉田卓彌, 阪上公博
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • 固体音の放射と空気音の透過の関係から遮音性能測定を考える
    矢入幹記, 阪上公博
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    [Invited]
    Invited oral presentation

  • 二重窓の遮音性能の実用的予測に関する基礎的考察(2)－予測理論提案に向けた試みー
    塚本陽平, 玉井芳, 阪上公博, 奥園健, 富川義弘
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • 二重窓の遮音性能の実用的予測に関する基礎的考察(1)－既存理論の適用の検討ー
    塚本陽平, 玉井芳, 阪上公博, 奥園健, 富川義弘
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • プレナム構造のドアへの適用に関する基礎的検討－実大ドア模型による実験的検討－
    阪上公博, 松村宗一郎, 奥園健
    日本音響学会2022年春季研究発表会, Mar. 2022, Japanese
    Oral presentation

  • 修正アダムス法を用いた陽的時間領域FEMによる室内音場解析－周波数依存のインピーダンス境界の実装－
    杉本優衣, 吉田卓彌, 奥園健, 阪上公博
    日本建築学会建築音響研究会, Nov. 2021, Japanese
    Oral presentation

  • 波動音響解析に基づく室内音響データベース構築に関する基礎検討－会議室を対象とした吸音効果の可聴化－
    奥園健, 吉田卓彌, 阪上公博
    日本建築学会建築音響研究会, Sep. 2021, Japanese
    Oral presentation

  • 多孔質仕切りによる単一MPP吸音体の性能向上に関する数値解析的検討
    岡山優生, 奥園健, 阪上公博
    日本音響学会2021年秋季研究発表会, Sep. 2021, Japanese
    Oral presentation

  • 修正アダムス法を用いた陽的時間領域FEMによる室内音場解析－周波数依存の吸音境界の実装－
    杉本優衣, 吉田卓彌, 奥園健, 阪上公博
    日本音響学会2021年秋季研究発表会, Sep. 2021, Japanese
    Oral presentation

  • Partitio of Unity FEM による室内音場解析－頑健な平面波数の設定に関する検討－
    向江俊一, 奥園健, 阪上公博
    日本音響学会2021年秋季研究発表会, Sep. 2021, Japanese
    Oral presentation

  • An explicit time-domain FEM for acoustic simulation in rooms with frequency-dependent impedance boundary: Comparison of performance in 2D simulation with frequency-domain FEM
    Takumi Yoshida, Takeshi Okuzono, Kimihiro Sakagami
    Internoise 2021, Aug. 2021, English
    Oral presentation

  • 時間領域FEMによる周波数依存の吸音境界を含む室内音場解析－周波数領域FEMとの比較－
    奥園健, 吉田卓彌, 阪上公博
    日本建築学会建築音響研究会, Mar. 2021, Japanese
    Oral presentation

  • アクリルパーティションへのMPPの応用
    草鹿みどり, 阪上公博, 奥園健, 山口大地, 城戸重幸
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • ドアに対するプレナム構造の適用に関する簡易実験
    阪上公博, 奥園健, 村田遥, 田丸加奈子, 坪倉正佳, 草鹿みどり, 向江俊一
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • Partition of Unity FEMによる３次元室内音場解析に関する基礎的研究
    田丸加奈子, 奥園健, 向江俊一, 阪上公博
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • Partition of Unity FEMによる室内音場解析－従来FEMとの計算コストの比較－
    奥園健, 阪上公博
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • 分散誤差を最適化した陽的時間領域FEMによる室内音響ソルバー
    吉田卓彌, 奥園健, 阪上公博
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • 単板ガラス窓の遮音性能の実用的予測式の構築（２）
    玉井芳, 阪上公博, 奥園健, 塚本陽平
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • 単板ガラス窓の遮音性能の実用的予測式の構築（１）
    塚本陽平, 玉井芳, 阪上公博, 奥園健
    日本音響学会, Mar. 2021

  • Partition of Unity FEMによる不均質なMPP吸音体の吸音特性の予測
    向江俊一, 奥園健, 草鹿みどり, 田丸加奈子, 阪上公博
    日本音響学会, Mar. 2021, Japanese
    Oral presentation

  • 空気音透過と固体音放射の関係－リブを有する無限大弾性板の場合－
    村田遥, 阪上公博, 奥園健, 矢入幹記, 豊田政弘
    日本音響学会建築音響研究会, Nov. 2020, Japanese
    Oral presentation

  • 不均質MPPの吸音特性と予測手法について－孔径あるいは開孔率が一定でない場合－
    草鹿みどり, 阪上公博, 奥園健, 城戸重幸, 山口大地
    日本音響学会建築音響研究会, Sep. 2020, Japanese
    Oral presentation

  • Basic study on prediction of sound insulation performance of a single-leaf window
    Tsukamoto Yohei, Sakagami Kimihiro, Okuzono, Takeshi Tomikawa Yoshihiro
    日本音響学会建築音響研究会, Jul. 2020, Japanese
    Oral presentation

  • Effect of deviation of the parameters by manufacturing accuracy of an MPP on its acoustic properties: Trial production of MPPs of various hole shapes by 3D printing
    Sakagami Kimihiro, Kusaka Midori Okuzono, Takeshi Nakanishi shinsuke
    日本音響学会建築音響研究会, Jun. 2020, Japanese
    Oral presentation

  • Measurement of the sound absorption characteristics of a spherical MPP space sound absorber
    Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono, Shigeyuki Kido, Daichi Yamaguchi
    日本音響学会建築音響研究会, Apr. 2020, Japanese
    Oral presentation

  • 有限弾性板における空気音透過と点加振放射の関係：数値解析による検討
    阪上 公博, 高橋和俊, 奥園健, 矢入幹記
    日本音響学会騒音振動研究会, Sep. 2019, Japanese, Domestic conference
    Oral presentation

  • 有限要素法による二重窓の遮音性能予測に向けた基礎検討－窓サイズの影響評価－
    三村茉莉絵, 塚本陽平, 富川義弘, 奥園健, 阪上公博
    日本音響学会建築音響研究会, Aug. 2019, Japanese, Domestic conference
    Oral presentation

  • ハニカムコアを充填した軽量二重壁の遮音特性に関する基礎的研究
    村田遥, 奥園健, 阪上公博
    日本建築学会近畿支部研究発表会, Jun. 2019, Japanese, Domestic conference
    Oral presentation

  • 背後ハニカム構造およびアレイ構造を有する単一通気性膜吸音体のモデル化に関する基礎的研究－粘性と熱伝導を考慮した理論解析－
    坪倉正佳, 奥園健, 阪上 公博
    日本建築学会近畿支部研究発表会, Jun. 2019, Japanese, Domestic conference
    Oral presentation

  • 等価流体モデルに基づく高性能吸音要素の誤差特性に関する研究
    田丸加奈子, 奥園健, 阪上公博
    日本建築学会近畿支部研究発表会, Jun. 2019, Japanese, Domestic conference
    Oral presentation

  • A discussion on finite element model of MPP using absorption elements based on an equivalent fluid
    OKUZONO TAKESHI, NITTA TAKAO, SAKAGAMI KIMIHIRO
    日本音響学会2019年春季研究発表会, Mar. 2019, Japanese, Domestic conference
    Oral presentation

  • 通気性膜吸音体アレイの垂直入射吸音特性に関する検討 –背後構造による吸音の考慮–
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2019年春季研究発表会, Mar. 2019, Japanese, Domestic conference
    Oral presentation

  • 修正Adams法を用いた時間領域有限要素法による室内音場解析-離散化誤差特性の解析
    YOSHIDA TAKUMI, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2019年春季研究発表会, Mar. 2019, Japanese, Domestic conference
    Oral presentation

  • 等価流体モデルに基づく吸音要素の分散誤差低減
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本建築学会大会, Sep. 2018, Japanese, Domestic conference
    Oral presentation

  • 室内音場解析のための一階常微分方程式に基づく時間領域有限要素法
    YOSHIDA TAKUMI, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2018年秋季研究発表会, Sep. 2018, Japanese, Domestic conference
    Oral presentation

  • Microperforated panels (MPPs) as "Next-generation sound absorbing material": How to use and install them
    SAKAGAMI KIMIHIRO
    Acoustical Society of Japan Autumn Meeting 2018, Sep. 2018, Japanese, Acoustical Society of Japan, Oita University, Domestic conference
    [Invited]
    Invited oral presentation

  • 一階常微分方程式に基づく時間領域有限要素法の吸音予測精度の改善
    YOSHIDA TAKUMI, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2018年秋季研究発表会, Sep. 2018, Japanese, Domestic conference
    Oral presentation

  • 背後ハニカム構造を有するMPP 吸音体による室内音環境改善 －小会議室における実装実験－
    SAKAGAMI KIMIHIRO, OKUZONO TAKESHI, YAIRI MOTOKI, HANYU TOSHIKI, HOSHI KAZUMA, HARADA SHINJI, TAKAHASHI SEIJI, UEDA YASUTAKA
    平成30年度日本建築学会 近畿支部研究発表会, Jun. 2018, Japanese, Domestic conference
    Oral presentation

  • 等価流体モデルに基づく吸音要素の分散誤差低減
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会6月度建築音響研究会, Jun. 2018, Japanese, Domestic conference
    Oral presentation

  • 等価流体モデルに基づく吸音要素の分散誤差低減
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    平成30年度日本建築学会近畿支部研究発表会, Jun. 2018, Japanese, Domestic conference
    Oral presentation

  • 通気性膜付き穿孔薄板を用いた吸音体の吸音特性に関する研究
    新田尭央, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO, 上幹実
    日本音響学会2018年春季研究発表会, Mar. 2018, Japanese, Domestic conference
    Oral presentation

  • 通気性膜吸音体アレイの残響室法吸音率–従来吸音体との比較–
    OKUZONO TAKESHI, 上西宏治, SAKAGAMI KIMIHIRO, 清水ひかる
    日本音響学会2018年春季研究発表会, Mar. 2018, Japanese, Domestic conference
    Oral presentation

  • 単一通気性膜吸音体の残響室法吸音率の数値予測
    清水徳泰, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2018年春季研究発表会, Mar. 2018, Japanese, Domestic conference
    Oral presentation

  • An experimental research for sound transmission through double windows with porous absorbent materials
    TSUKAMOTO YOHEI, TOMIKAWA YOSHIHIRO, MAIKAWA HIDETOSHI, KOMOTO YUSUKE, SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, Jan. 2018, Japanese, 東京, Domestic conference
    Oral presentation

  • 有限弾性板による空気音透過と固体音放射の関係-単純な条件下における解析的検討-
    高橋克俊, 矢入幹記, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO, 豊田政弘
    日本音響学会2017年秋季研究発表会, Sep. 2017, Japanese, Domestic conference
    Poster presentation

  • 通気性膜吸音体を有する音場解析のための一階常微分方程式に基づく時間領域有限要素法-反復法の局所的適用による計算効率化-
    吉田卓彌, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2017年秋季研究発表会, Sep. 2017, Japanese, Domestic conference
    Oral presentation

  • 通気性膜吸音体アレイの吸音特性に関する実験的検討
    上西宏治, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2017年秋季研究発表会, Sep. 2017, Japanese, Domestic conference
    Oral presentation

  • 一階常微分方程式に基づく時間領域有限要素法による室内音場解析-時空間離散化誤差の数値解析-
    吉田卓彌, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会2017年秋季研究発表会, Sep. 2017, Japanese, Domestic conference
    Oral presentation

  • Acoustic improvement of a small meeting room using a honeycomb-backed MPP sound absorbing system
    HOSHI KAZUMA, HANYU TOSHIKI, SAKAGAMI KIMIHIRO, YAIRI MOTOKI, OKUZONO TAKESHI, HARADA SHINJI, TAKAHASHI SEIJI, UEDA YASUTAKA
    日本音響学会建築音響研究会, Aug. 2017, Japanese, 日本音響学会, 東京, Domestic conference
    Oral presentation

  • 波動音響数値解析における微細穿孔板吸音体のモデル化-拡張作用モデルと表面インピーダンスモデルの比較-
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    2017年度日本建築学会大会, Aug. 2017, Japanese, Domestic conference
    [Invited]
    Invited oral presentation

  • A pilot study on the sound absorption characteristics of permeable membrane sound absorbers in cylindrical PCCC shell shape
    SAKAGAMI KIMIHIRO, SHINMA AKITAKA, OKUZONO TAKESHI, FUNAHASHI KOTA, TOYODA MASAHIRO, SUZUKI HIROTAKA, KOYANAGI NAO
    日本音響学会建築音響研究会, Aug. 2017, Japanese, 日本音響学会, 東京, Domestic conference
    Oral presentation

  • 有限弾性板による空気音透過と固体音放射の関係に関する基礎的研究
    高橋克俊, 矢入幹記, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO, 豊田政弘
    平成29年度日本建築学会近畿支部発表会, Jun. 2017, Japanese, Domestic conference
    Oral presentation

  • 数値残響室による通気性膜吸音体の吸音特性の予測に関する基礎的研究
    清水徳泰, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    平成29年度日本建築学会近畿支部発表会, Jun. 2017, Japanese, Domestic conference
    Oral presentation

  • 局所作用性MPP吸音体の吸音特性のin-situ測定
    新田尭央, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    平成29年度日本建築学会近畿支部発表会, Jun. 2017, Japanese, Domestic conference
    Oral presentation

  • 通気性膜吸音体アレイの吸音メカニズムに関する有限要素解析
    UENISHI Koji, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会2017年春季研究発表会, Mar. 2017, Japanese, 明治大学, Domestic conference
    Oral presentation

  • 小規模矩形室に設置した MPP 吸音体の吸音効果に関する有限要素解析
    OKUZONO Takeshi, IZUMI Shugo, SAKAGAMI Kimihiro
    日本音響学会2017年春季研究発表会, Mar. 2017, Japanese, 明治大学, Domestic conference
    Oral presentation

  • 一階常微分方程式に基づく3次元時間領域有限要素解析による通気性膜吸音体の取り扱い
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会2017年春季研究発表会, Mar. 2017, Japanese, 明治大学, Domestic conference
    Oral presentation

  • MPP 吸音体の吸音特性の in-situ 測定に関する研究–局所作用性材料を対象 とした検討–
    OKUZONO Takeshi, SAKAGAMI Kimihiro, NITTA Takao
    日本音響学会2017年春季研究発表会, Mar. 2017, Japanese, 明治大学, Domestic conference
    Oral presentation

  • 通気性膜吸音体アレイの吸音特性に関する有限要素解析
    UENISHI Koji, OKUZONO Takeshi, SAKAGAMI Kimihiro
    騒音・振動研究会, Jan. 2017, Japanese, 神戸大学, Domestic conference
    Oral presentation

  • Limp microperforated panel finite elements and its application
    OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, Dec. 2016, English, International conference
    [Invited]
    Invited oral presentation

  • Use of smartphones for introductory acoustics education
    SAKAGAMI Kimihiro, SATOH Fumiaki, OMOTO Akira
    5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, Nov. 2016, English, Hilton Hawaiian Village Waikiki Beach Resort, International conference
    [Invited]
    Invited oral presentation

  • Three-dimensional space sound absorbers using microperforated panels
    SAKAGAMI Kimihiro, TOYODA Masahiro, YAIRI Motoki, OKUZONO Takeshi
    5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, Nov. 2016, English, Hilton Hawaiian Village Waikiki Beach Resort, International conference
    [Invited]
    Invited oral presentation

  • Numerical study on the absorption performance of MPP sound absorber installed in small rectangular rooms
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, Nov. 2016, English, Hilton Hawaiian Village Waikiki Beach Resort, International conference
    [Invited]
    Invited oral presentation

  • 吸音材料のおはなし－音を吸収するしくみのいろいろ
    SAKAGAMI Kimihiro
    第１０回KOBE工学サミット in Tokyo, Oct. 2016, Japanese, 神戸大学工学振興会, 東京六甲クラブ, Domestic conference
    Public discourse

  • MPP 吸音体を有する室内音場の 3 次元有限要素解析
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会2016年秋季研究発表会, Sep. 2016, Japanese, 富山大学, Domestic conference
    Oral presentation

  • 通気性膜吸音体を取り扱うための 1 階常微分方程式に基づく時間領域有限要素法
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    2016年度日本建築学会大会, Aug. 2016, Japanese, 福岡大学, Domestic conference
    Oral presentation

  • 矩形室に設置した MPP 吸音体の吸音効果に関する数値解析的検討
    IZUMI Shugo, OKUZONO Takeshi, SAKAGAMI Kimihiro
    2016年度日本建築学会大会, Aug. 2016, Japanese, 福岡大学, Domestic conference
    Oral presentation

  • 通気性膜吸音体の時間領域有限要素モデルの開発
    KATSUYAMA Akihiro, OKUZONO Takeshi, SAKAGAMI Kimihiro
    平成28年度日本建築学会 近畿支部研究発表会, Jun. 2016, Japanese, 大阪工業技術専門学校, Domestic conference
    Oral presentation

  • 通気性膜アレイの吸音特性に関する数値解析的研究
    UENISHI Koji, OKUZONO Takeshi, SAKAGAMI Kimihiro
    平成28年度日本建築学会 近畿支部研究発表会, Jun. 2016, Japanese, 大阪工業技術専門学校, Domestic conference
    Oral presentation

  • 1階常微分方程式に基づく時間領域有限要素解析による室内音場解析-通気性膜吸音体のモデル化-
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    建築音響研究会, Jun. 2016, Japanese, 東京大学生産技術研究所, Domestic conference
    Oral presentation

  • 通気性膜吸音体の吸音特性予測のための時間領域有限要素解析手法
    OKUZONO Takeshi, SAKAGAMI Kimihiro, KATSUYAMA Akihiro
    日本音響学会2016年春季研究発表会, Mar. 2016, Japanese, 横浜市, Domestic conference
    Oral presentation

  • 通気性膜アレイの吸音特性に関する数値解析的検討
    OKUZONO Takeshi, SAKAGAMI Kimihiro, UENISHI Koji
    日本音響学会2016年春季研究発表会, Mar. 2016, Japanese, 横浜市, Domestic conference
    Oral presentation

  • 固体音の放射と空気音の透過の関係‐単層無限大弾性板による基礎的検討‐
    YAIRI Motoki, NISHIBARA Kousuke, SAKAGAMI Kimihiro, OKUZONO Takeshi
    日本音響学会2016年春季研究発表会, Mar. 2016, Japanese, 横浜市, Domestic conference
    Oral presentation

  • 吸音材料のおはなし～音を吸収するしくみのいろいろ
    SAKAGAMI KIMIHIRO, YAIRI MOTOKI
    日本音響学会春季研究発表会, Mar. 2016, Japanese, 日本音響学会, 横浜, Domestic conference
    [Invited]
    Invited oral presentation

  • 吸音を有する室内音場解析のための安定的な陽的時間領域有限要素法
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会2016年春季研究発表会, Mar. 2016, Japanese, 横浜市, Domestic conference
    Oral presentation

  • An explicit time-domain finite element method for room acoustics simulations with frequency-independent finite impedance boundary
    OKUZONO Takeshi, YOSHIDA Takumi, SAKAGAMI Kimihiro, OTSURU Toru
    日本音響学会建築音響研究会, Dec. 2015, Japanese, 舞鶴市, Domestic conference
    Oral presentation

  • 陽的時間領域有限要素法による室内音場解析–分散誤差の理論解析–
    OKUZONO Takeshi, SAKAGAMI Kimihiro, YOSHIDA Takumi
    日本音響学会2015年秋季研究発表会, Sep. 2015, Japanese, 会津若松市, Domestic conference
    Oral presentation

  • 微細穿孔板（MPP）を用いた空間吸音体
    SAKAGAMI KIMIHIRO, YAIRI MOTOKI, TOYODA MASAHIRO
    日本騒音制御工学会研究発表会, Sep. 2015, Japanese, 日本騒音制御工学会, 東京, Domestic conference
    [Invited]
    Invited oral presentation

  • 多孔質材を充填した立体型MPP空間吸音体の吸音特性-その2 数値解析による理論的検討-
    TOYODA Masahiro, OKANO Mitsuru, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会2015年秋季研究発表会, Sep. 2015, Japanese, 会津若松市, Domestic conference
    Oral presentation

  • 多孔質材を充填した立体型MPP空間吸音体の吸音特性-その1 実験的検討-
    SAKAGAMI Kimihiro, OKANO Mitsuru, OKUZONO Takeshi, TOYODA Masahiro, TOYODA Emi
    日本音響学会2015年秋季研究発表会, Sep. 2015, Japanese, 会津若松市, Domestic conference
    Oral presentation

  • 建築音環境予測への有限要素法の適用–計算効率化手法–
    OKUZONO Takeshi, OTSURU Toru, TOMIKU Reiji, OKAMOTO Noriko, SAKAGAMI Kimihiro
    日本音響学会2015年秋季研究発表会, Sep. 2015, Japanese, 会津若松市, Domestic conference
    [Invited]
    Invited oral presentation

  • Relationship between the field incidence sound transmission coefficient and radiated sound power driven by a point force of an elastic plate with infinite extent
    YAIRI MOTOKI, NISHIBARA KOSUKE, OKUZONO TAKESHI, SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, Aug. 2015, Japanese, 日本音響学会建築音響研究委員会, 東京, Domestic conference
    Oral presentation

  • 陽的時間領域有限要素法による室内音場解析-長方形要素に対する修正積分則-
    YOSHIDA Takumi, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本建築学会平成27年度近畿支部研究発表会, Jun. 2015, Japanese, 大阪市, Domestic conference
    Oral presentation

  • 単一 MPP 吸音体を有する室内音場の有限要素解析-メッシュの空間分解能と吸音モデリングに関する検討-
    IZUMI Shugo, OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本建築学会平成27年度近畿支部研究発表会, Jun. 2015, Japanese, 大阪市, Domestic conference
    Oral presentation

  • 固体放射音のパワー測定による壁体の遮音性能の評価に関する基礎的研究
    NISHIBARA Kousuke, YAIRI Motoki, SAKAGAMI Kimihiro, OKUZONO Takeshi
    日本建築学会平成27年度近畿支部研究発表会, Jun. 2015, Japanese, 大阪市, Domestic conference
    Oral presentation

  • MPP 吸音構造を有する室内音場の有限要素解析 –剛壁を有する単一 MPP 吸音構造の場合–
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会春季研究発表会, Mar. 2015, Japanese, 中央大学, Domestic conference
    Oral presentation

  • 陽的時間領域有限要素法による室内音場解析
    OKUZONO Takeshi, OTSURU Toru, SAKAGAMI Kimihiro
    日本音響学会秋季研究発表会, Sep. 2014, Japanese, 北海学園大学, Domestic conference
    Oral presentation

  • 微細穿孔板を有する室内音場の周波数領域有限要素解析
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会秋季研究発表会, Sep. 2014, Japanese, 北海学園大学, Domestic conference
    Oral presentation

  • Absorption characteristics of a microperforated panel absorber and increasing its absorption frequency range
    YAIRI MOTOKI, SAKAGAMI KIMIHIRO
    日本騒音制御工学会秋季研究発表会, Sep. 2014, Japanese, 日本騒音制御工学会, 東京, Domestic conference
    [Invited]
    Invited oral presentation

  • Applications of the next-generation sound absorbing materials: Microperforated panels (MPP) and permeable membrane
    SAKAGAMI KIMIHIRO, YAIRI MOTOKI
    日本騒音制御工学会秋季研究発表会, Sep. 2014, Japanese, 日本騒音制御工学会, 東京, Domestic conference
    [Invited]
    Invited oral presentation

  • 微細穿孔板を有する音場解析のための有限要素定式化-等価電気回路理論および波動理論との比較-
    OKUZONO Takeshi, SAKAGAMI Kimihiro
    日本音響学会建築音響研究会, Aug. 2014, Japanese, サテライトキャンパス広島, Domestic conference
    Oral presentation

  • 通気性膜を用いた立体型空間吸音体の吸音特性に関する基礎的研究
    FUNAHASHI KOTA, NISHIKAWA CHINAMI, SAKAGAMI KIMIHIRO, TOYODA MASAHIRO
    日本音響学会建築音響研究会, Jul. 2014, Japanese, 日本音響学会建築音響研究委員会, 京都, Domestic conference
    Oral presentation

  • A basice study on the absorption characteristics of a three-dimensional permeable membrane space sound absorber
    FUNAHASHI KOTA, NISHIKAWA CHINAMI, SAKAGAMI KIMIHIRO, TOYODA MASAHIRO
    日本建築学会近畿支部研究発表会, Jun. 2014, Japanese, 日本建築学会近畿支部, 大阪, Domestic conference
    Oral presentation

  • 加振力放射モードを用いた固体放射音の性状予測と制御
    石橋 慎司, 山口 善三, SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, Nov. 2013, Japanese, 日本音響学会建築音響研究委員会, 大阪市, Domestic conference
    Oral presentation

  • 立体型ＭＰＰ空間吸音体に関する基礎的研究－その２ 数値解析による理論的検討－
    豊田 政弘, 小畠 星司, SAKAGAMI KIMIHIRO
    日本音響学会秋季研究発表会, Sep. 2013, Japanese, 日本音響学会, 豊橋市, Domestic conference
    Oral presentation

  • 立体型ＭＰＰ空間吸音体に関する基礎的研究－その１ 実験的検討－
    SAKAGAMI KIMIHIRO, 矢入 幹記, 豊田 恵美, 豊田 政弘
    日本音響学会秋季研究発表会, Sep. 2013, Japanese, 日本音響学会, 豊橋市, Domestic conference
    Oral presentation

  • 加振力放射モードを用いた個体放射音提言の検討 自由音場に存在する構造物の場合
    石橋 慎司, 山口 善三, SAKAGAMI KIMIHIRO
    日本音響学会秋季研究発表会, Sep. 2013, Japanese, 日本音響学会, 豊橋市, Domestic conference
    Poster presentation

  • ２重ＭＰＰ空間吸音体の吸音特性に対する多孔質吸音層の影響
    岡野 充, SAKAGAMI KIMIHIRO, 矢入 幹記
    日本音響学会建築音響研究会, Jul. 2013, Japanese, 日本音響学会建築音響研究委員会, 京都市, Domestic conference
    Oral presentation

  • 単一板に対する球面波入射の音響透過に関する実験的検討
    塚本 陽平, 矢入 幹記, 中川 博, SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, Jul. 2013, Japanese, 日本音響学会建築音響研究委員会, 京都市, Domestic conference
    Oral presentation

  • ２重ＭＰＰ空間吸音体の吸音特性に対する多孔質吸音層の影響
    岡野 充, SAKAGAMI KIMIHIRO
    日本建築学会近畿支部研究発表会, Jun. 2013, Japanese, 日本建築学会近畿支部, 大阪市, Domestic conference
    Oral presentation

  • 立体型ＭＰＰ空間吸音体に関する実験的研究
    SAKAGAMI KIMIHIRO, 矢入 幹記, 豊田 恵美, 豊田 政弘
    日本音響学会建築音響研究会, May 2013, Japanese, 日本音響学会建築音響研究委員会, 広島市, Domestic conference
    Oral presentation

  • 立体型ＭＰＰ空間吸音体に関する解析的研究
    豊田 政弘, 小畠 星司, SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, May 2013, Japanese, 日本音響学会建築音響研究委員会, 広島市, Domestic conference
    Oral presentation

  • 建築音響学の講義や演習におけるスマートフォンの利用
    SATOH FUMIAKI, SAKAGAMI KIMIHIRO, OMOTO AKIRA
    日本音響学会2013年春季研究発表会, Mar. 2013, Japanese, 東京都八王子市, Domestic conference
    Oral presentation

  • 加振力放射モードを用いた固体放射音低減の検討－反射面の影響を考慮した場合－
    ISHIBASHI SHINJI, YAMAGUCHI ZENZO, SAKAGAMI KIMIHIRO, MORIMOTO MASAYUKI
    日本音響学会2012年秋季研究発表会, Sep. 2012, Japanese, 長野市, Domestic conference
    Poster presentation

  • スマートフォンを利用した音環境導入教育の試み
    SAKAGAMI KIMIHIRO, SATOH FUMIAKI, OMOTO AKIRA
    日本音響学会2012年秋季研究発表会, Sep. 2012, Japanese, 長野市, Domestic conference
    Oral presentation

  • 微細穿孔板（MPP）を利用した空間吸音体の提案とその音響特性
    SAKAGAMI KIMIHIRO
    日本音響学会建築音響研究会, Jul. 2012, Japanese, 京都市, Domestic conference
    [Invited]
    Invited oral presentation

  • 円筒型MPP空間吸音体の吸音特性に関する実験的研究－内部に円筒状の芯を入れた場合－
    FUJITA SHOTA, SAKAGAMI KIMIHIRO, YAIRI MOTOKI, TOYODA EMI, MORIMOTO MASAYUKI
    日本音響学会建築音響研究会, Jul. 2012, Japanese, 京都市, Domestic conference
    Oral presentation

  • 球面波入射に対する単一板の音響透過に関する基礎的研究
    TSUKAMOTO YOHEI, SAKAGAMI KIMIHIRO, YAIRI MOTOKI, MORIMOTO MASAYUKI
    日本建築学会近畿支部研究発表会, Jun. 2012, Japanese, Domestic conference
    Oral presentation

  • 加振力放射モードを用いた音響放射パワの評価－反射面による影響を考慮した場合－
    ISHIBASHI SHINJI, YAMAGUCHI ZENZO, SAKAGAMI KIMIHIRO, MORIMOTO MASAYUKI
    日本建築学会近畿支部研究発表会, Jun. 2012, Japanese, 大阪市, Domestic conference
    Oral presentation

  • 円筒型MPP空間吸音体の吸音特性に関する実験的研究－内部に円筒状の芯を入れた場合－
    FUJITA SHOTA, SAKAGAMI KIMIHIRO, YAIRI MOTOKI, TOYODA EMI, MORIMOTO MASAYUKI
    日本建築学会近畿支部研究発表会, Jun. 2012, Japanese, 大阪市, Domestic conference
    Oral presentation

  • Experimental study on reduction of sound radiation from vibrating structure: deliberation of force radiation study on reduction of sound radiation from vibrating structure: deliberation of force radiation modes
    Yamaguchi Zenzo, Sakagami Kimihiro, Morimoto Masayuki, Bolton J Stuart
    Spring meeting of ASJ, Mar. 2012, Japanese, 日本音響学会, Yokohama, Domestic conference
    Oral presentation

  • A case study of introductory teaching method for environmental acoustics using a smartphone
    Sakagami Kimihiro, Satoh Fumiaki, Omoto Akira
    Techinical Committee of Architectural Acoustics, ASJ, Mar. 2012, Japanese, 日本音響学会建築音響研究委員会, Osaka, Domestic conference
    Oral presentation

  • Reduction of sound radiation by using dynamic absorber: Deliberation of force radiation modes (Part 2)
    Yamaguchi Zenzo, Matsuoka Hidetoshi, Sakagami Kimihiro, Morimoto Masayuki, Bolton J Stuart, Yamagiwa Ichiro
    Techinical Committee of Architectural Acoustics, ASJ, Oct. 2011, Japanese, 日本音響学会建築音響研究委員会, Tokyo, Domestic conference
    Oral presentation

  • Sound absorption characteristics of a microperforated panel absorber backed by a porous layer - The effect of the treatment of the end correction of a perforation -
    Kobatake Seiji, Sakagami Kimihiro, Morimoto Masayuki, Yairi Motoki
    Techinical Committee of Architectural Acoustics, ASJ, Aug. 2011, Japanese, 日本音響学会建築音響研究委員会, Kyoto, Domestic conference
    Oral presentation

  • Evalluation of sound radiatio by using force radiation modes: application to a two-member structure
    Miura Shuhei, Yamaguchi Zenzo, Sakagami Kimihiro, Morimoto Masayuki
    Techinical Committee of Architectural Acoustics, ASJ, Aug. 2011, Japanese, 日本音響学会建築音響研究委員会, Kyoto, Domestic conference
    Oral presentation

  • Evaluation of sound radiation using extended radiation modes for a multiple lelment vibration structure
    Miura Shuhei, Yamaguchi Zenzo, Sakagami Kimihiro, Morimoto Masayuki
    日本建築学会近畿支部研究発表会, Jun. 2011, Japanese, 日本建築学会近畿支部, Osaka, Domestic conference
    Oral presentation

  • Sound absorption characteristics of a double-leaf structure composed of an MPP and a permeable membrane with a porous layer
    Kobatake Seiji, Sakagami Kimihiro, Morimoto Masayuki
    日本建築学会近畿支部研究発表会, Jun. 2011, Japanese, 日本建築学会近畿支部, Osaka, Domestic conference
    Oral presentation

  • A basic study on a cylindrical MPP space sound absorber (CMSA)
    Sakagami Kimihiro, Oshitani Takayuki, Yairi Motoki, Toyoda Emi, Morimoto Masayuki
    Techinical Committee of Architectural Acoustics, ASJ, Apr. 2011, Japanese, 日本音響学会建築音響研究委員会, Tokyo, Domestic conference
    Oral presentation

  • Reduction of sound radiation by using dynamic absorber: Deliberation of force radiation modes
    YAMAGUCHI Zenzo, MATSUOKA Hidetoshi, SAKAGAMI Kimihiro, MORIMOTO Masayuki, BOLTON Stuart J, YAMAGIWA Ichiro
    2011 Spring Meeting, Acoutical Society of Japan, Mar. 2011, Japanese, 日本音響学会, Tokyo, Domestic conference
    Oral presentation

  • Reduction of sound radiation by using dynamic absorber: Deliberation of force radiation modes
    MATSUOKA Hidetoshi, YAMAGUCHI Zenzo, SAKAGAMI Kimihiro, MORIMOTO Masayuki, BOLTON Stuart J, YAMAGIWA Ichiro
    Technical Committee on Architectural Acoustics, Acoustical Society of Japan, Oct. 2010, Japanese, 日本音響学会建築音響研究委員会, Kyoto, Domestic conference
    Oral presentation

  • The effect of permeable membrane into an air cavity of DLMPP
    FUKUTANI Yusaku, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    Technical Committee on Architectural Acoustics, Acoustical Society of Japan, Oct. 2010, Japanese, 日本音響学会建築音響研究委員会, Kyoto, Domestic conference
    Oral presentation

  • Effect of the honeycomb in the back cavity on the sound absorptivity of panel absorbers: Some considerations on mechanism of absorptivity variation by a honeycomb
    TOYODA Masahiro, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TAKAHASHI Daiji
    2010 Autumn Meeting, Acoustical Society of Japan, Sep. 2010, Japanese, 日本音響学会, Osaka, Domestic conference
    Oral presentation

  • Effect of the honeycomb in the back cavity on the sound absorptivity of panel absorbers: Some considerations on the decrease in absorption coefficient due to a honeycomb
    SAKAGAMI Kimihiro, KONDO Maiko, MORIMOTO Masayuki, TOYODA Masahiro
    2010 Autumn Meeting, Acoustical Society of Japan, Sep. 2010, Japanese, 日本音響学会, Osaka, Domestic conference
    Oral presentation

  • Wideband MPP absorber with a combination of two different perforation MPPs
    YAIRI Motoki, TAKEBAYASHI Kenichi, KOGA Takashi, SAKAGAMI Kimihiro
    2010 Autumn Meeting, Acoustical Society of Japan, Sep. 2010, Japanese, 日本音響学会, Osaka, Domestic conference
    Poster presentation

  • Reduction of sound radiation by using force radiation modes: Effects of attached mass on force radiation modes
    YAMAGUCHI Zenzo, SAKAGAMI Kimihiro, MORIMOTO Masayuki, BOLTON Stuart J, YAMAGIWA Ichiro
    Technical Committee on Architectural Acoustics, Acoustical Society of Japan, Aug. 2010, Japanese, 日本音響学会建築音響研究委員会, Osaka, Domestic conference
    Oral presentation

  • Sound absorption characteristics of a microperforated panel absorber backed by an absorbent layer
    SAKAGAMI Kimihiro, KANO Kenichi, MORIMOTO Masayuki, YAIRI Motoki
    Techinical Committee on Architectural Acoustics, Acoustical Society of Japan, Jun. 2010, Japanese, 日本音響学会建築音響研究委員会, Hiroshima, Domestic conference
    Oral presentation

  • 微細穿孔板吸音構造の吸音特性とその広帯域化
    YAIRI Motoki, SAKAGAMI Kimihiro
    日本音響学会春季研究発表会, Mar. 2010, Japanese, 日本音響学会, 調布市, Domestic conference
    Invited oral presentation

  • 次世代の吸音・遮音技術-最近の研究動向-
    SAKAGAMI Kimihiro
    日本音響学会春季研究発表会, Mar. 2010, Japanese, 日本音響学会, 調布市, Domestic conference
    Invited oral presentation

  • 拡張放射モードによる音響放射パワ低減-質量付加が拡張放射モードに与える影響-
    NAKAHIRA Wataru, SAKAGAMI Kimihiro, MORIMOTO Masayuki, J. Stuart Bolton, YAMAGIWA Ichiro
    日本音響学会春季研究発表会, Mar. 2010, Japanese, 日本音響学会, 調布市, Domestic conference
    Oral presentation

  • 微細穿孔板吸音構造の並列配置による残響室法吸音率の広帯域化-背後壁の振動と周期の影響-
    YAIRI Motoki, TAKEBAYASHI Kenichi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2009, Japanese, 日本音響学会, 郡山市, Domestic conference
    Poster presentation

  • 微細穿孔板吸音構造の並列配置による残響室法吸音率の広帯域化-入射面の凹凸の影響-
    TAKEBAYASHI Kenichi, YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2009, Japanese, 日本音響学会, 郡山市, Domestic conference
    Poster presentation

  • 微細穿孔板(MPP)と通気性膜からなる空間吸音体の吸音特性
    SAKAGAMI Kimihiro, NAKAMORI Tomohito, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会秋季研究発表会, Sep. 2009, Japanese, 日本音響学会, 郡山市, Domestic conference
    Oral presentation

  • 背後に剛壁を有する2重通気性膜の吸音特性
    FUKUTANI Yusaku, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2009, Japanese, 日本音響学会, 郡山市, Domestic conference
    Oral presentation

  • 微細穿孔板(MPP)と通気性膜からなる各種吸音構造の吸音特性
    FUKUTANI Yusaku, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会建築音響研究会, Aug. 2009, Japanese, 日本音響学会建築音響研究委員会, 調布市, Domestic conference
    Oral presentation

  • 2重微細穿孔板(MPP)空間吸音体の吸音特性に対するハニカム構造の影響
    YAMASHITA Ippei, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会建築音響研究会, Aug. 2009, Japanese, 日本音響学会建築音響研究委員会, 調布市, Domestic conference
    Oral presentation

  • 微細穿孔板吸音構造の並列配置による残響室法吸音率の広帯域化-背後空気層の区画と周期に関する基礎的検討-
    YAIRI Motoki, TAKEBAYASHI Kenichi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会建築音響研究会, Jul. 2009, Japanese, 日本音響学会建築音響研究委員会, 長野市, Domestic conference
    Oral presentation

  • 板振動型吸音体の吸音特性に及ぼす背後ハニカム構造の影響
    SAKAGAMI Kimihiro, KONDO Maiko, MORIMOTO Masayuki
    日本音響学会建築音響研究会, Jul. 2009, Japanese, 日本音響学会建築音響研究委員会, 長野市, Domestic conference
    Oral presentation

  • MPPと通気性膜からなる背後に剛壁を有する吸音構造-波動理論による吸音特性の解析-
    FUKUTANI Yusaku, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部研究発表会, Jun. 2009, Japanese, 日本建築学会近畿支部, 大阪市, Domestic conference
    Oral presentation

  • Effect of a honeycomb in a back cavity on the absorption characteristics of an MPP absorber: Detailed analysis based on Helmholtz-Kirchhoff formulation
    SAKAGAMI Kimihiro, YAMASHITA Ippei, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会建築音響研究会, Mar. 2009, Japanese, 浜松市, Domestic conference
    Oral presentation

  • Analysis of the acoustic properties of a double-leaf permeable membrane
    SAKAGAMI Kimihiro, YOSHIDA Keishi, MORIMOTO Masayuki
    日本音響学会春季研究発表会, Mar. 2009, Japanese, 東京都, Domestic conference
    Oral presentation

  • Effect of a honeycomb in back cavities on the absorption characteristics of an MPP absorber
    YAMASHITA Ippei, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会秋季研究発表会, Sep. 2008, Japanese, 福岡市, Domestic conference
    Poster presentation

  • A basic study on wideband sound absorbers with a combination of MPP and panel absorbers
    KONDO Maiko, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会秋季研究発表会, Sep. 2008, Japanese, 福岡市, Domestic conference
    Oral presentation

  • A basic study on wideband sound absorbers with a combination of MPP and porous absorber
    OKAMOTO Naoko, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会秋季研究発表会, Sep. 2008, Japanese, 福岡市, Domestic conference
    Oral presentation

  • Wideband MPP absorber with a combination of two different depths of the back cavity arranged in parallel
    YAIRI Motoki, TAKEBAYASHI Kenichi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2008, Japanese, 福岡市, Domestic conference
    Oral presentation

  • An instruction approach for a graduate thesis project by electro-acoustical equivalent circuit models: Analyses of sound absorbing systems
    SAKAGAMI Kimihiro
    日本音響学会秋季研究発表会, Sep. 2008, Japanese, 福岡市, Domestic conference
    Oral presentation

  • Wideband MPP absorber with a combination of two different depths of the back cavity arranged in parallel
    YAIRI Motoki, TAKEBAYASHI Kenichi, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会建築音響研究会, Aug. 2008, Japanese, 東京都, Domestic conference
    Oral presentation

  • A basic study on wideband sound absorbers with a combination of MPP and other absorbers
    OKAMOTO Naoko, KONDO Maiko, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    日本音響学会建築音響研究会, Jul. 2008, Japanese, 吹田市, Domestic conference
    Oral presentation

  • Analysis of sound absorption systems using electro-acoustical equivalent circuit models -An approach for graduate thesis projects-
    SAKAGAMI Kimihiro
    日本音響学会建築音響研究会, Jul. 2008, Japanese, 吹田市, Domestic conference
    Oral presentation

  • A basic study on wideband sound absorbers with a combination of MPP absorber and panel absorber
    KONDO Maiko, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部, Jun. 2008, Japanese, 大阪市, Domestic conference
    Oral presentation

  • A basic study on wideband sound absorbers with a combination of MPP absorber and porous absorber
    OKAMOTO Naoko, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部, Jun. 2008, Japanese, 大阪市, Domestic conference
    Oral presentation

  • Sound absorption of a double-leaf microperforated-panel with an air-back cavity -Detailed discussion with a strict theory-
    MATSUTANI Kiyotaka, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部, Jun. 2008, Japanese, 大阪市, Domestic conference
    Oral presentation

  • A study on sound absorption characteristics of a honeycomb-backed double MPP absorber
    YAMASHITA Ippei, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部, Jun. 2008, Japanese, 大阪市, Domestic conference
    Oral presentation

  • A note on the relationship between the sound absorption by microperforated panels and panel absorbers
    Sakagami, Kimihiro, Morimoto, Masayuki, Yairi, Motoki
    日本音響学会建築音響研究会, Feb. 2008, Japanese, 浜松, Domestic conference
    Oral presentation

  • 二重微細穿孔板空間吸音体に関する実験的検討
    Yairi, Motoki, Sakagami, Kimihiro, Morimoto, Masayuki
    日本音響学会建築音響研究会, Oct. 2007, Japanese, 宮崎, Domestic conference
    Oral presentation

  • A wideband sound absorber with a combination of two microperforated panel absorbers arranged in parallel
    Nagayama, Yoshiki, Sakagami, Kimihiro, Morimoto, Masayuki
    日本音響学会2007年度秋季研究発表会, Sep. 2007, Japanese, 日本音響学会, 甲府, Domestic conference
    Oral presentation

  • 建築材料としての微細穿孔板（MPP)
    Sakagami, Kimihiro
    日本機械学会2007年度年次大会, Sep. 2007, Japanese, 日本機械学会, 吹田, Domestic conference
    Invited oral presentation

  • A basic study on the analysis of the sound field using Fourier series of the boundary condition
    Tanigawa, Masaki, Fukuwaka, Naoko, Sakagami, Kimihiro, Morimoto, Masayuki
    日本音響学会2007年度秋季研究発表会, Sep. 2007, Japanese, 甲府, Domestic conference
    Oral presentation

  • A basic study on wideband sound absorbers with a combination of two MPP absorbers
    Nagayama, Yoshiki, Sakagami, Kimihiro, Morimoto, Masayuki
    Kinki Branch Meeting of Architectural Institute of Japan, Jun. 2007, Japanese, 日本建築学会, Osaka, Domestic conference
    Oral presentation

  • Sound absorption characteristics of a honeycomb-backed microperforated panel (MPP) absorber
    SAKAGAMI Kimihiro, NAKAJIMA Kosuke, MORIMOTO Masayuki, YAIRI Motoki, MINEMURA Atsuo
    4th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, Nov. 2006, English, 米国音響学会, 日本音響学会, Honolulu,Hawai, USA, International conference
    [Invited]
    Invited oral presentation

  • 任意形状の周期構造物周辺の音場解析に関する基礎的考察 その3-観測点位置や音波入射条件等による適用性の変化-
    FUKUWAKA Naoko, TANIGAWA Masanori, MATSUURA Yukiko, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2006, Japanese, 日本音響学会, 金沢市, Domestic conference
    Oral presentation

  • 3重微細穿孔板(MPP)の吸音特性に関する基礎的研究
    NAKAMORI Tomohito, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本音響学会秋季研究発表会, Sep. 2006, Japanese, 日本音響学会, 金沢市, Domestic conference
    Oral presentation

  • 微細穿孔板(MPP)の建築内装への適用について -補強のための2,3の試みとその音響的影響-
    SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki, MINEMURA Atsuo
    日本音響学会 建築音響研究会, Jun. 2006, Japanese, 日本音響学会 建築音響研究会, 国分寺市, Domestic conference
    Oral presentation

  • 周期構造物周辺の音場解析に関する基礎的研究―周期境界条件を考慮した解析法の適用範囲―
    FUKUWAKA Naoko, TANIGAWA Masanori, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部研究発表会, Jun. 2006, Japanese, 日本建築学会近畿支部, 大阪市, Domestic conference
    Oral presentation

  • 3重微細穿孔板の吸音特性に関する基礎的研究
    NAKAMORI Tomohito, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    日本建築学会近畿支部研究発表会, Jun. 2006, Japanese, 日本建築学会近畿支部, 大阪市, Domestic conference
    Oral presentation

  • Effect of honeycomb structure in the back cavity on the absorption characteristics of microperforated panel absorbers: 2.Attempt of model analysis
    SAKAGAMI Kimihiro, NAKAJIMA Kosuke, MORIMOTO Masayuki, YAIRI Motoki, MINEMURA Atsuo
    2006 Spring Meeting, Acoustical Society of Japan, Mar. 2006, Japanese, 日本音響学会, Nihon University, Domestic conference
    Oral presentation

  • Effect of honeycomb structure in the back cavity on the absorption characteristics of microperforated panel absorbers: 1.Experimental considerations
    YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, TOYODA Emi, SUGIE Satoshi, MINEMURA ATSUO
    2006 Spring Meeting, Acoustical Society of Japan, Mar. 2006, Japanese, 日本音響学会, Nihon University, Domestic conference
    Oral presentation

  • *Acoustical properties of microperforated panel absorbers with various back cavity configurations
    YAIRI Motoki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MINEMURA Atsuo
    2005 Autumn Meeting, Acoustical Society of Japan, Sep. 2005, Japanese, 日本音響学会, Tohoku University, Domestic conference
    Oral presentation

  • The effect of back honeycomb structure on sound absorption characteristics of microperforated panel absorber
    NAKAJIMA Kosuke, SAKAGAMI Kimihiro, MORIMOTO Masayuki, YAIRI Motoki
    Technical Committee on Architectural Acoustics, Acoustical Society of Japan, Jul. 2005, Japanese, 日本音響学会, Kobe University, Domestic conference
    Oral presentation

  • A basic study on the analysis of sound fields around periodic structures - Boundary integral equation analysis using the Green funcion for a periodic boundary condition-
    MATSUURA Yukiko, TANIGAWA Masaki, SAKAGAMI Kimihiro, MORIMOTO Masayuki
    Kinki Branch, Architectural Institute of Japan, Jun. 2005, Japanese, 日本建築学会, 大阪科学技術専門学校, Domestic conference
    Oral presentation

  • A basic study on the sound field analysis of periodic structures by boundary integral equation
    TANIGAWA Masaki, SAKAGAMI Kimihiro, MORIMOTO Masayuki, MATSUURA Yukiko
    Technical Committee on Architectural Acoustics, Acoustical Society of Japan, Apr. 2005, Japanese, 日本音響学会, Hiroshima International University, Domestic conference
    Oral presentation

  • 任意形状の周辺構造物の音場解析に関する基礎的考察をの2－有限個構造物周辺の音場環境への適用
    谷川 将規, 阪上 公博, 森本 政之
    日本音響学会 春季研究発表会, 2004, Japanese, 日本音響学会, 琉球大学, Domestic conference
    Oral presentation

  • 任意形状の周期構造物周辺の音場解析に関する基礎的考察－ 周期境界条件を満たすGreen関数を用いた境界積分方程式法－
    谷川 将規, 阪上 公博, 森本 政之
    日本音響学会 秋季研究発表会, 2004, Japanese, 日本音響学会, 琉球大学, Domestic conference
    Oral presentation

  • 2重微小穿板と背後壁からなる吸音構造の吸音特性に関する研究－背後構造の影響－
    中島 幸祐, 阪上 公博, 森本 政之
    日本建築学会近畿支部研究発表会, 2004, Japanese, 日本建築学会近畿支部, 大阪工業技術専門学校, Domestic conference
    Oral presentation

  • 2重Microperforated panelの吸音特性に関する基礎的考察
    阪上 公博, 小池 若菜, 森本 政之
    日本音響学会音響研究会, 2004, Japanese, 日本音響学会音響研究会, 未記入, Domestic conference
    Oral presentation

  • 橋梁高架構造物音の計算方法についての一考察
    紺野 義仁, 池谷 公一, 阪上 公博, 鳥海 英宏, 山本 貢平
    日本音響学会騒音・振動研究会, Mar. 2003, Japanese, 日本音響学会 騒音・振動研究委員会, 日本自動車研究所, Domestic conference
    Others

  • 多孔質型吸音材の吸音特性に対する表面保護フィルムの影響
    西尾 純子, 阪上 公博, 森本 政之
    日本建築学会近畿支部2003年度研究報告会, 2003, Japanese, 日本建築学会近畿支部, 未記入, Domestic conference
    Oral presentation

  • 多孔質吸音材の吸音特性に対する表面保護フィルムの影響
    阪上 公博, 西尾 純子, 森本 政之
    日本音響学会2003年秋期研究発表会, 2003, Japanese, 日本音響学会, 大同工業大学, Domestic conference
    Oral presentation

  • 2重通気性膜構造の吸音特性に関する基礎的研究
    江山 真衣, 阪上 公博, 森本 政之
    日本建築学会近畿支部2003年度研究報告会, 2003, Japanese, 日本建築学会近畿支部, 未記入, Domestic conference
    Oral presentation

■ Affiliated Academic Society
  • Institute of International Sound and Vibration

  • 米国音響学会

  • 日本騒音制御工学会

  • 日本建築学会

  • 日本音響学会

■ Research Themes
  • Challenges in improvement of acoustic environment in buildings in 'new lifestyle'
    阪上 公博
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, 01 Apr. 2021 - 31 Mar. 2024
    新生活様式における建築音環境改善手法として，本年度は（１）MPPを使用した吸音性を持つ透明アクリル製卓上パーティションの，室内実装時の効果についての実験的検討，（２）自然換気機能を持つプレナムドアの遮音効果に関する実験的基礎検討を実施した． （２）は当初の計画にはなかったが，その課題としての重要性から急遽，本年度の計画に入れて検討したものである． （１）については，本課題開始前の準備的検討において試作実験によって仕様策定したパーティションを試作し，（A)残響時間の短い響きの少ない室，および（B)残響時間が長く響きの多い室の2つにおいて，パーティションを実際に設置し，MPPの有無によってどの程度の室内音響指標が変化するか，実際の使用状況を想定して，実験的に室内音響指標を測定して検討した．その結果，（B)においては，音声明瞭度に関する指標を中心に，吸音効果による若干の音響的改善が見られたが，（A）においては明確かつ顕著な効果は見られなかった．もともと残響の少ない室においては，吸音の効果は表れにくいが，今回はパーティションの面積が小さいこと及び使用したMPPの仕様について改善が必要であることが考えられた．これについては，次年度以降の課題として検討したいと考えている． （２）については，一般的な連続する2つのオフィスの開口部に，プレナムドアを設置し，室間音圧レベルを測定して遮音効果を実験的に検討した．その結果，プレナム内部に吸音処理をした場合は高周波数域において最大20dB程度，吸音処理がない場合でも低周波数域5dB程度，高周波数域で13dB程度の遮音効果を得ることができた．今後は，数値解析等を併用して，より効果的な仕様を策定できるよう検討する予定である．

  • 阪上 公博
    科学研究費補助金／基盤研究(C), 2008, Principal investigator
    Competitive research funding

  • A Study on the Generating Mechanism of Elevated Structure Noise and Its Countermeasures
    MORIMOTO Masayuki, SAKAGAMI Kimihiro, KITAMURA Yasutoshi
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for General Scientific Research (B), Grant-in-Aid for General Scientific Research (B), Kobe University, 1994 - 1995
    The problems with the elevated structure noise, which is the noise in audio-frequency range radiated from the structural elements of the elevated motorway, recently arises around the elevated motorways. To investigate the mechanism of the generation of, and to establish the countermeasure to the elevated structure noise, the following considerations were carried out : 1. Model analysis of the acoustic radiation of steel I-beams : The sound radiation characteristics of web plate of steel I-beams were analyzed using a simplified model. The beam was modelled a baffled strip of elastic plate of infinite length in the model analysis. The features of the calculated results were discussed in comparison with those of those of the actual elevated structure noise in order to shed some light on the main cause of the noise. 2. Boundary element analysis of the vibration of steel I-beams : To make a further investigation on the main cause of the noise, vibration of a steel I-beam was analyzed by boundary element method (BEM). The relationship between the elevated structure noise and the structure of the beam was discussed in detail from the above BEM results. As the results from the model analysis, the radiated sound from an elastic plate strip of infinite length was found to have very similar features to the elevated structure noise. This can be interpreted to imply that steel I-beams can possibly be the main cause of the elevated structure noise. The results of the BEM analysis show that the transverse vibration, which may be the most responsible to sound radiation, is dominant in the web plate around 500Hz, and it is still dominant when the web is excited by a nearly in-plane force. These results suggest that the web plate of steel I-beams is strongly relevant to the elevated structure noise. From the above results, it can be concluded that the main cause of the elevated structure noise is the web plate of steel I-beams. Though there is still some problems to be solved, which include the actual excitation condition of the beam, for example, the above results can help with basic ideas for countermeasures to the elevated structure noise problems.

  • オ-ディトリアムにおけるステージ床の音響特性に関する基礎的研究
    阪上 公博
    日本学術振興会, 科学研究費助成事業 奨励研究(A), 奨励研究(A), 神戸大学, 1994 - 1994
    本年度の研究においては、オ-ディトリアムにおける舞台床の音響特性について考察する上で重要な、次の2つの問題について、理論解析によって究明を試みた. (1)球面波入射に対する無限大弾性板の音響反射特性 (2)球面波入射及び点加振力を受ける無限大弾性板の音響特性 上記(1)は、舞台床が音源に極めて近接していること、(2)は、チェロやコントラバスのように床と音源(楽器)が接触していることを、条件として考慮したものである。なお、実際の建築条件においてしばしば見られる床下の空気層あるいは奈落のスペースについて、それらの影響を考慮するため、(1)、(2)ともに板が背後空気層を有する場合についても解析を行ない、考察した. その結果、(1)については遠距離受音点での近似解が、平面波入射の場合の解とほとんど同形であり、同様の性質を有することが示された.(2)については、(1)の解と、点加振力による放射音圧の和となり、両者のエネルギ和を中心として、干渉によって変動することを示した.いずれの場合においても、背後空気層の影響は、著しいディップとして現れる. なお、(2)については、音源と加振力の位相関係の影響が大きく、低音域に著しい反射性の増加あるいは減少を生じる.この点について、実際の楽器における加振力特性を実測調査しているが、未だ十分な知見は得られていない.

  • オ-ディトリアムにおける音響反射板の設計に関する研究
    阪上 公博
    日本学術振興会, 科学研究費助成事業 奨励研究(A), 奨励研究(A), 神戸大学, 1993 - 1993
    本研究では,オ-ディトリアムにおける音響反射板の設計指針を得るため,これまで全く解かれていない,背後構造を持つ無限大弾性板の音響反射問題を,平面波入射の場合について理論的に解き,以下の知見を得た. 1.背後空気層・吸音層を有する板の反射・吸音問題について,本研究で得た理論解が,実測値と良好に一致することを確認した.理論解析結果から,背後層を持つ板の反射特性は,低周波数域に顕著なディップを持つことを示し,反射面として使用する場合には注意を要することを指摘した.また,板の諸定数や背後層厚,構成,層内の媒質によって,反射・吸音特性がどのように変化するかを明らかにした. 2.背後層とリブ(野縁)を有する板の場合,リブの効果によって低音域で反射率が上昇し,中高域に多くのディップを生じることが分かった.したがって,しばしば問題となる低音域での反射性を向上するには,リブが若干の効果を持つことを示した.また,反射特性に及ぼすパラメタの影響を明らかにした. 上記に加え,球面波が入射する場合の単一の無限大弾性板による反射音場を解析し,平面波入射に対する結果との比較により,音波の入射条件の違いによる影響について考察した.その結果,板の物性値等による影響は,平面波入射の場合と同様であることを示した. また,関連する問題として,膜による音響反射問題についても理論的に解析し,薄く軽い膜でも,条件によっては反射板として利用可能であることを示した.また,反射板の材質を選択するための指標として,単一の無限大弾性板の反射率が低音域で0.5まで低下する周波数をカットオフ周波数と定義し,理論解を示すとともに計算図表を提案した.

■ Industrial Property Rights
  • 微細穿孔板利用の吸音構造及び吸音材
    SAKAGAMI KIMIHIRO
    特願2005-192339, 30 Jun. 2005, 大学長, 特許5008277, 08 Jun. 2012
    Patent right

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