佐藤 逸人 | ![]() |
サトウ ハヤト | |
大学院工学研究科 建築学専攻 | |
准教授 | |
土木・建築工学関係 |
2016年03月 日本音響学会, 学会活動貢献賞, 日本音響学会の学会活動の活性化に多大な貢献があった若手の正会員又は学生会員
日本国国内学会・会議・シンポジウム等の賞
2012年03月 日本音響学会, 佐藤論文賞, 音響学に関し学術上及び技術上貢献するところが大きい研究業績を日本音響学会誌に発表した正会員又は学生会員
2009年03月 日本音響学会, 独創研究奨励賞板倉記念, 「聴き取りにくさ」を用いた音声伝送性能の評価とそのユニバーサルデザインへの応用
2007年03月 日本音響学会, 粟屋 潔学術奨励賞, 音響に関する学問,技術の奨励のため, 有為と認められる新進の研究・技術者
[招待有り]
研究論文(国際会議プロシーディングス)
[招待有り]
研究論文(国際会議プロシーディングス)
[査読有り]
研究論文(学術雑誌)
研究論文(国際会議プロシーディングス)
[査読有り]
研究論文(学術雑誌)
In Japan, there are many natural disasters that often expose residents to the risk of serious damage. To minimize such damage, the Japanese government has built a disaster information network using a radio system, and as part of it, an outdoor acoustic mass notification system is routinely operated. However, its intelligibility may be reduced by outdoor noise, which is increased by rainfall. In the present study, long-term surveys of rainfall rate and outdoor noise were conducted at four sites with different surrounding environments and the relationship between them was analyzed to clarify the effects of the rainfall rate on the physical characteristics of outdoor noise. The results indicated that the median sound pressure level for each 1/3 octave band increased with increasing rainfall rate, mainly above mid-frequencies of around 500 Hz to 1 kHz, though the frequency at which the level began to rise depended on the time period and site. Furthermore, a newly proposed macroscopic model for estimating the sound pressure level of outdoor noise under rainy conditions indicated that the distance from the loudspeaker of the system to ensure a certain speech-to-noise ratio could be significantly reduced by heavy rainfall. (C) 2020 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2021年01月, APPLIED ACOUSTICS, 172, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
[査読有り][招待有り]
研究論文(学術雑誌)
研究論文(国際会議プロシーディングス)
Long-path echo is a salient factor that causes the degradation of the intelligibility of speech transmitted through a wide area outdoor environment or a very large indoor space using public-address systems. To robustly transmit speech information under such conditions, it is important to overcome this effect by controlling the characteristics of speech sounds. In this study, we consider the effects of inserting pauses between the words of a sentence. We performed word intelligibility tests using a series of four continuous words, called a quadruplet. Various pause lengths and long-path echo patterns were applied to the quadruplet. The results of the experiments demonstrate that word intelligibility under a long-path echo is significantly improved by the insertion of pauses between the words. Intelligibility can approach the same levels observed in the absence of echoes for a pause length of approximately 200 ms, which is almost the same as the length of 1-mora for the words used in the experiments. Moreover, this 200 ms pause is known to be sufficient to improve speech recognition in older adults. These results suggest that inter-word pauses of a length of approximately 1-mora can generally enhance the robustness of speech communication systems when used under a severe environment.
Elsevier Ltd, 2018年11月01日, Applied Acoustics, 140, 263 - 274, 英語[査読有り]
研究論文(学術雑誌)
Many previous studies and related standards on speech privacy have adopted speech intelligibility as a subjective measure under the assumption of a strong correlation between them. Meanwhile, some studies have attempted to directly evaluate speech privacy. However, the methods used in these studies required evaluators to clearly understand what speech privacy is, while the concept of speech privacy is not widely known to ordinary people using public spaces. In the present study, questionnaire-based surveys and a listening test were conducted to clarify the relationship between speech intelligibility and speech privacy using a more suitable method for directly evaluating speech privacy. The respondents and participants were instructed to imagine a specific situation at a consulting room in a hospital because the required speech privacy depends on the situation. The questionnaire before the listening test showed that a feeling of dissatisfaction was the strongest feeling evoked by overhearing speech. Therefore, we used this feeling as a term for evaluating speech privacy performance that most people can easily accept and understand. The threshold of the feeling of dissatisfaction obtained from the listening test was compared with word intelligibility scores from our previous study. The comparison showed that the threshold of the feeling of dissatisfaction corresponds to a word intelligibility score of around 10-20% for participants with a typical sensitivity to personal information leakage through conversation. In addition, the ratio of participants who felt dissatisfaction increased with increasing background noise level under equal-intelligibility conditions. (C) 2017 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2017年09月, APPLIED ACOUSTICS, 124, 38 - 47, 英語[査読有り]
研究論文(学術雑誌)
The massive earthquake that occurred on 11 March 2011 in Japan demonstrated that the intelligibility of speech presented over mass notification sound systems is often significantly degraded by long-path echoes. This study examines the effect of word familiarity on speech intelligibility in the presence of long-path echoes, in order to increase speech intelligibility in such systems. We performed two experiments using sets of four sequentially connected words (quadruplets), in place of an actual sentence. In Experiment 1, we investigated word intelligibility in the presence of simulated long-path echoes for quadruplets consisting of words with the same word familiarity rank. The results indicated that the intelligibility of high-familiarity words is higher than that of low-familiarity words, irrespective of the number of simulated long-path echoes. In Experiment 2, quadruplets with mixed word familiarity were used to investigate intelligibility under more realistic conditions. The results of Experiment 2 demonstrate that the intelligibility of high-familiarity words is higher than that of low-familiarity words under long path echo conditions, even when high- and low-familiarity words coexist in one quadruplet. These facts show that high-familiarity words are more robust against the influence of long-path echoes than low familiarity words, strongly suggesting that announcements presented from mass notification sound systems should consist of high familiarity words as much as possible. (C) 2017 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2017年09月, APPLIED ACOUSTICS, 124, 30 - 37, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
研究論文(学術雑誌)
Acoustic guide signals for visually impaired persons sometimes do not include the high frequency components necessary for front-back discrimination in sound localization. However, head movement makes this discrimination possible, even in such cases. This paper clarifies the necessary duration of continuous sound to be able to use head movement effectively in sound localization and whether or not, the effect of head movement appears in sound localization of intermittent sound used in place of continuous one. Head movement is effective for sound localization when the duration of continuous sound exceeds 800 ms, and persists even if the sound is intermittent rather than continuous. (C) 2015 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2016年01月, APPLIED ACOUSTICS, 101, 58 - 63, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
研究論文(国際会議プロシーディングス)
本研究では、視覚障害者の円滑な移動支援を目的として国内で広く用いられている音案内(ピン・ポーン音)の実用的な場面での方向指示性能を評価する目的で、視覚障害者を対象として歩行可能な大空間において歩行実験を実施した。パラメータは音案内の提示音圧レベル、誘導方向、スピーカの種類であった。その結果、従来の実験室内と比して音響的条件が歩行軌跡、歩行開始時の方向、歩行速度に及ぼす影響について新たな知見が得られた。また、パラメトリックスピーカなどの狭指向性のスピーカではカバーエリアから外れると誘導できなくなる場合があることを示した。
一般社団法人 日本福祉のまちづくり学会, 2015年07月, 福祉のまちづくり研究, 17 (2), 13 - 23, 日本語[査読有り]
研究論文(学術雑誌)
2011年に刊行された日本建築学会環境規準では,公共空間における音声伝送性能のクラス分けと,空間の用途に応じたクラスの下限値が示されている。しかし,同規準は発話速度が5.5syll./sの結果を基に定められたものであり,公共空間の音声伝送性能が同規準を満たしたとしても,発話速度によっては音声情報が正確に伝わらないことも考えられる。そこで本研究では,同規準においてパラメトリックに考慮されていない発話速度と音声レベルが音声情報伝達に及ぼす影響を明らかにすると共に,同規準が適用できる発話速度と音声レベルの範囲を明らかにした。
日本音響学会, 2014年12月, 日本音響学会誌, 70 (12), 627 - 635, 日本語[査読有り]
研究論文(学術雑誌)
The role of acoustic guide signals is to lead visually impaired persons to their destination points. However, little scientific evidence indicates that acoustical guide signals that are currently used in Japan can play that role. This study was undertaken to evaluate the sound-localization performance of typical acoustical guide signals under noisy conditions and in a reverberant sound field. Results of listening tests suggest that 1) effects of noise on sound localization can be presented as a function of the signal-to-noise ratio, 2) the initial delay time and reverberation energy are more important than the reverberation time, and 3) a temporal pattern of a guide signal is an important factor for sound localization in reverberant sound fields. (C) 2014 Institute of Noise Control Engineering.
INST NOISE CONTROL ENGINEERING, 2014年01月, NOISE CONTROL ENGINEERING JOURNAL, 62 (1), 1 - 9, 英語[査読有り]
研究論文(学術雑誌)
A study was conducted to investigate whether spontaneous head movements occurred during natural sound localization. All experiments were performed in an anechoic chamber with the light turned on. The stimulus was a narrow-band noise whose frequency range varied from 150 Hz to 500 Hz without any localization cues for front-back discrimination. The binaural sound pressure level of stimulus was 65 dB measured by using a KEMAR dummy head and an A-weighting filter. The stimulus was radiated to a subject from one of the filled six loudspeakers without any outward difference in appearance between the filled and open loudspeakers. The subjects heard and responded to only one stimulus in every experiment, which was radiated from one of the six filled loudspeakers to investigate the spontaneous head movements during natural sound localization without any training or learning. The head movements of the subjects were recorded and analyzed in three dimensions by motion capture.
2013年, Acoustical Science and Technology, 34 (4), 292 - 295, 英語[査読有り]
研究論文(学術雑誌)
Listening difficulty ratings [Morimoto et al., J. Acoust. Soc. Am. 116, 1607-1613 (2004)] were obtained for 20 young adult listeners and 34 elderly listeners in reverberant and noisy sound fields simulated in an anechoic room. The listening difficulty ratings were compared with acoustical objective measures. The results and analyses showed the following: (i) The correlation between listening difficulty ratings and the revised speech transmission index (STIr), and that for the useful-detrimental ratio (U-50) were high, regardless of the age of the listeners. (ii) STIr and U-50 need to be increased by 0.12 and 4.2 dB, respectively, to equalize the listening difficulty ratings for the elderly listeners with those for the young listeners. (iii) The estimation accuracies for STIr and U-50 can be improved by calculating them with the L-eq of background noise linearly increased by 4 to 10 dB, which depends on the age of the listeners and the objective measures. However, the improvement was not statistically significant for the elderly listeners. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4714790]
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2012年06月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 131 (6), 4596 - 4605, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
[招待有り]
研究論文(国際会議プロシーディングス)
Conversations must be shielded from people in an adjacent room if they include confidential information. Word intelligibility tests were performed in a total of 185 sound fields to examine the relationship between sound insulation performance and the degree of conversation leakage. The parameters of the test sound fields were background noise level in the adjacent room and the level difference between the two rooms. The background noise level was varied from 30 to 50 dB (A-weighted). The level difference was parametrically varied in terms of eight frequency characteristics and 10 absolute values. The results showed that word intelligibility scores were strongly correlated with the A-weighted speech-to-noise ratio and SNR(uni32). Equal-intelligibility contours, which can easily show the weighted level difference and A-weighted background noise level required to achieve a certain level of word intelligibility scores, were obtained from a multiple logistic regression analysis. (C) 2011 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2012年01月, APPLIED ACOUSTICS, 73 (1), 43 - 49, 英語[査読有り]
研究論文(学術雑誌)
The acceptable range of speech level as a function of background noise level was investigated on the basis of word intelligibility scores and listening difficulty ratings. In the present study, the acceptable range is defined as the range that maximizes word intelligibility scores and simultaneously does not cause a significant increase in listening difficulty ratings from the minimum ratings. Listening tests with young adult and elderly listeners demonstrated the following. (1) The acceptable range of speech level for elderly listeners overlapped that for young listeners. (2) The lower limit of the acceptable speech level for both young and elderly listeners was 65 dB (A-weighted) for noise levels of 40 and 45 dB (A-weighted), a level with a speech-to-noise ratio of +15 dB for noise levels of 50 and 55 dB, and a level with a speech-to-noise ratio of +10 dB for noise levels from 60 to 70 dB. (3) The upper limit of the acceptable speech level for both young and elderly listeners was 80 dB for noise levels from 40 to 55 dB and 85 dB or above for noise levels from 55 to 70 dB. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3609122]
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2011年09月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 130 (3), 1411 - 1419, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
研究論文(学術雑誌)
近年の住宅の居室は,遮音性能の向上や家電製品の低騒音化により,非常に静かな空間になりつつある。その一方で,これまでは騒音によってマスクされていた残響音が聞こえ易くなり,居室における会話に悪影響を及ぼすことが懸念される。本研究では,居室における「会話」に支障のない残響音の条件を明らかにすることを目的とした主観評価実験を行った。その結果,以下を明らかにした。(1)「聴取」よりも「発話」のほうが残響音の影響を受け易い。(2)「発話」と「会話」に対する残響音の影響は同程度である。(3)本実験で用いた音場の範囲では,「聴取」,「発話」,「会話」のいずれにおいても,残響時間を0.3s程度にすれば響きが気になることはない。
一般社団法人日本音響学会, 2010年11月, 日本音響学会誌, Vol. 66, No. 11, pp. 541-551 (11), 541 - 551, 日本語[査読有り]
研究論文(学術雑誌)
誘導鈴は方向情報や場所情報を正確に伝達できて初めて、利用者に対して安全で円滑な移動支援を行うことが出来る。すなわち、然るべき方向から聞こえ、誘導すべき方向を示すことが重要である。しかし、誘導鈴の音量や周波数特性などの物理的特性については科学的な根拠がなく作成されたために、提示されている信号の方向の方向定位性能、言い換えればどの程度正確に方向が利用者に伝わるか、は明らかでない。本研究では、視覚障害者の円滑な移動支援を目的として国内で広く用いられている音響案内(ピン・ポーン音、鳥の声、音声)の方向定位性能を評価する目的で、高齢者を含む視覚障害者に被験者として参加してもらい、頭を自由に動かせる条件で、方向判断の正確さと方向同定までに要する時間を測定した。その結果、1)音響案内の信号による方向定位性能の違い、2)利用者の属性と音響案内の信号の関係、の2点について議論し、特に高齢者を考慮した場合の音響案内の信号の持つべき特性について定性的に明らかにした。
一般社団法人 日本福祉のまちづくり学会, 2010年01月, 福祉のまちづくり研究, Vol. 11, No. 2, pp. 41-48 (2), 41 - 48, 日本語[査読有り]
研究論文(学術雑誌)
This paper outlines methods to simulate the sound of one's own voice as it is affected by room acoustics, using binaural technology. An oral-binaural room impulse response (OBRIR) measurement can be made of a real room environment from the mouth to the ears of the same head. For simulation, a talker's voice is convolved in real-time with the OBRIR, so that they can hear the sound of their own voice in the simulated room environment. We show by example how OBRIR measurements can be made using human subjects (by measuring the transfer function of speech) or by a head and torso simulator (HATS), and we illustrate the differences between individualised measurements and HATS measurements. We extend the HATS measurement method through binaural room scanning, which allows the simulation system to produce natural changes in the OBRIR as subjects rotate their heads while listening to their own voice.
AUSTRALIAN ACOUSTICAL SOC, 2009年12月, ACOUSTICS AUSTRALIA, 37 (3), 98 - 103, 英語[査読有り]
研究論文(学術雑誌)
[査読有り]
研究論文(学術雑誌)
研究論文(国際会議プロシーディングス)
研究論文(国際会議プロシーディングス)
研究論文(国際会議プロシーディングス)
研究論文(国際会議プロシーディングス)
本論文では,音の空間特性の一つである到来方向に着目し,音声の到来方向が聴き取りにくさに及ぼす影響を聴感実験により明らかにした。その結果,聴き取りにくさと音声の到来方向の関係は,SN比の影響を受けることを示した。SN比が±0dBA以下の場合,音声の到来方向が前方や後方から到来する場合の方が側方よりも聴き取りにくく,その差は弁別できる。SN比が+10dBA以上の場合,どの方向から音声が到来しても聴き取りにくさは実質的には変わらない。また,聴き取りにくさと音声の到来方向の関係は,SN比によらず,暗騒音の両耳間相関度の影響を受けないことを示した。
一般社団法人日本音響学会, 2008年08月, 日本音響学会誌, Vol. 64, No. 8, pp. 451-456 (8), 451 - 456, 日本語[査読有り]
研究論文(学術雑誌)
The previous work [Morimoto et al., J. Acoust. Soc. Am. 116, 1607-1613] showed that listening difficulty ratings can be used to evaluate speech transmission performance more exactly and sensitively than intelligibility. Meanwhile, speech transmission performance is usually evaluated using acoustical objective measures, which are directly associated with physical parameters of room acoustic design. However, the relationship between listening difficulty ratings and acoustical objective measures was not minutely investigated. In the present study, a total of 96 impulse responses were used to investigate the relationship between listening difficulty ratings and several objective measures in unidirectional sound fields. The result of the listening test showed that (1) the correlation between listening difficulty ratings and speech transmission index (STI) is the strongest of all tested objective measures, and (2) A-weighted D-50, C-50, and center time, which are obtained from the impulse responses passed through an A-weighted filter, also strongly correlate with listening difficulty ratings, and their correlations with listening difficulty ratings are not statistically different from the correlation between listening difficulty ratings and STI. (C) 2008 Acoustical Society of America.
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2008年04月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 123 (4), 2087 - 2093, 英語[査読有り]
研究論文(学術雑誌)
本論文では,空間特性の一つである両耳間相関度(ICC)に着目し,音声と暗騒音のICCが聴き取りにくさに及ぼす影響を聴感実験により明らかにした。その結果, SN比が±0dBA以上で残響時間が4秒以内である公共空間では,反射音も考慮した音声と暗騒音のICCは,いずれも聴き取りにくさに有意に影響しないことを示した。このことは空間特性を考慮に入れないで行ってきた,従来の聴き取りにくさの研究成果が現実の公共空間の音声伝達性能の評価に適用できることを意味している。
一般社団法人日本音響学会, 2007年09月, 日本音響学会誌, Vol. 63, No. 9, pp. 520-528 (9), 520 - 528, 日本語[査読有り]
研究論文(学術雑誌)
The speech level of verbal information in public spaces should be determined to make it acceptable to as many listeners as possible, while simultaneously maintaining maximum intelligibility and considering the variation in the hearing levels of listeners. In the present study, the universally acceptable range of speech level in reverberant and quiet sound fields for both young listeners with normal hearing and aged. listeners with hearing loss due to aging was investigated. Word intelligibility scores and listening difficulty ratings as a function of speech level were obtained by listening tests. The results of the listening tests clarified that (1) the universally acceptable ranges of speech level are from 60 to 70 dBA, from 56 to 61 dBA, from 52 to 67 dBA and from 58 to 63 dBA for the test sound fields with the reverberation times of 0.0, 0.5, 1.0 and 2.0 s, respectively, and (2) there is a speech level that falls within all of the universally acceptable ranges of speech level obtained in the present study; that speech level is around 60 dBA. (c) 2007 Acoustical Society of America.
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2007年09月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 122 (3), 1616 - 1623, 英語[査読有り]
研究論文(学術雑誌)
Listening difficulty ratings is a new measure to evaluate speech transmission performance in public spaces. The advantage is that it can evaluate sound fields with higher speech transmission performance more accurately and sensitively, than intelligibility scores. The effect of aging, or hearing level on listening difficulty ratings has not been clarified yet. In this paper, the results of the listening tests demonstrated that hearing levels above 2 kHz significantly affect both word intelligibility scores and listening difficulty ratings for the aged. For the aged, both of them can be estimated from the results for the young plus the average of hearing levels at 2 and 4 kHz. The equations for estimating the word intelligibility scores and the. listening difficulty ratings for the aged are obtained from the multiple linear regression analyses. The estimated scores. and ratings generally coincide with the measured scores and ratings, and the averaged difference between them is 5.2% for the word intelligibility scores and 3.8% for the listening difficulty ratings, in the range of listening tests performed in this paper. (C) 2007 Acoustical Society of America.
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2007年05月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 121 (5), 2915 - 2922, 英語[査読有り]
研究論文(学術雑誌)
For ideal speech communication in public spaces, it is important to determine the optimum speech level for various background noise levels. However, speech intelligibility scores, which is conventionally used as the subjective listening test to measure the quality of speech communication, is near perfect in most everyday situations. For this reason, it is proposed to determine optimum speech levels for speech communication in public spaces by using listening difficulty ratings. Two kinds of listening test were carried out in this work. The results of the tests and our previous work [M. Morimoto, H. Sato, and M. Kobayashi, J. Acoust. Soc. Am. 116, 1607-1613 (2004)] are jointly discussed for suggesting the relation between the optimum speech level and background noise level. The results demonstrate that: (1) optimum speech level is constant when background noise level is lower than 40 dBA, (2) optimum speech level appears to be the level, which maintains around 15 dBA of SN ratio when the background noise level is more than 40 dBA, and (3) listening difficulty increases as speech level increases under the condition where SN ratio is good enough to keep intelligibility near perfect. (c) 2007 Acoustical Society of America.
ACOUSTICAL SOC AMER AMER INST PHYSICS, 2007年01月, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 121 (1), 251 - 256, 英語[査読有り]
研究論文(学術雑誌)
研究論文(国際会議プロシーディングス)
研究論文(国際会議プロシーディングス)
[招待有り]
研究論文(国際会議プロシーディングス)
[査読有り]
研究論文(学術雑誌)
[査読有り]
研究論文(国際会議プロシーディングス)
[査読有り]
研究論文(国際会議プロシーディングス)
[査読有り]
研究論文(国際会議プロシーディングス)
Speech would be radiated with sound system in multipurpose halls, so speech transmission quality would be influenced by the difference of the number/position and of frequency characteristic of loudspeakers. In this study, subjective rating of speech transmission quality called "easiness of speech perception" was measured in simulated sound fields with monaural/binaural systems to find binaural effects. The results suggest binaural simulation is needed. And the relations between subjective rating and several physical indices were examined. As a result, subjective rating would be influenced by frequency characteristic that could not be evaluated with existing indices such as STI.
一般社団法人日本建築学会, 2002年06月20日, 日本建築学会技術報告集 : journal of architecture and building science, 117 (1490), 147 - 150, 日本語本稿では残響及び騒音を付加した音場において,単語親密度で難易度を統制した単語リストによる単語了解度試験実験を若年者と高齢者を被験者として用いて行い,単語親密度と加齢による聴力損失が単語了解度に及ぼす影響について検討を行った。その結果,室内公共空間の音声伝達性能を単語了解度で評価するためには,単語親密度を統制する必要があること,年齢にかかわらず高親密度となる単語を選定し,安定した評価結果を得られるようにする必要があることを示した。また,若年者と高齢者の単語了解度の差が25%であること,音韻を知覚した後に単語の意味を獲得する過程における加齢による影響は認められないことを示した。
一般社団法人 日本音響学会, 2002年, 日本音響学会誌, 58 (6), 346 - 354, 日本語[招待有り]
記事・総説・解説・論説等(商業誌、新聞、ウェブメディア)
[招待有り]
速報,短報,研究ノート等(学術雑誌)
記事・総説・解説・論説等(学術雑誌)
[査読有り]
記事・総説・解説・論説等(学術雑誌)
記事・総説・解説・論説等(学術雑誌)
記事・総説・解説・論説等(学術雑誌)
学術書
その他
口頭発表(一般)
ポスター発表
ポスター発表
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
公開講演,セミナー,チュートリアル,講習,講義等
[招待有り]
シンポジウム・ワークショップパネル(指名)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
[招待有り]
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
シンポジウム・ワークショップパネル(指名)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
シンポジウム・ワークショップパネル(指名)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(基調)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
[招待有り]
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
シンポジウム・ワークショップパネル(指名)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(招待・特別)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
公開講演,セミナー,チュートリアル,講習,講義等
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
[招待有り]
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
シンポジウム・ワークショップパネル(指名)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
ポスター発表
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
ポスター発表
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
[招待有り]
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(招待・特別)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
口頭発表(一般)
現状の案内放送の多言語対応では,複数言語を順次放送しており,非常時には後から放送される 言語を第1言語とする人の初動が遅れてしまう。この課題を解決する手法として,研究代表者らは多言語を同時に拡声するシステムについて検討してきた。このシステムの高度化にあたり,自分の第1言語であるターゲット言語の探索しやすさを向上させることが必要となる。2021年度は,ターゲット単語の探索のしやすさに影響する要因として,ターゲット単語の時間的位置と空間的位置に着目し,これらが単語了解度に与える影響について検討した。日本語,英語,中国語,韓国語の4言語それぞれの5連単語を同時に再生した音声を刺激とした。刺激は,正面からすべての言語を再生する条件を基準として,空間的に離して配置した2から4個のスピーカを用いて,1スピーカにつき1言語を再生する条件,1スピーカにつき2言語を再生する条件など様々な条件で提示した。聴取者は日本語を第1言語とする学生であり,提示される刺激に含まれる日本語単語を書き取らせた。 (1)4言語を同時に再生する場合,ターゲット単語の時間的位置が後ろになるにつれて単語了解度(ただしく単語を書き取れた割合)が上昇する。 (2)空間的に離して配置した2つのスピーカから2言語ずつを再生する場合,1 つのスピーカから 4言語すべてを再生する条件と比較して,ターゲット単語の単語了解度は10パーセントポイント以上上昇する。 (3)3つのスピーカから3言語をそれぞれ再生する場合に,中央のスピーカから再生する音声の単語了解度が両端のスピーカから再生する場合よりもやや低下するが,音圧レベルを上げることで,言語間の単語了解度の差を 小さくできるということを示した.
競争的資金
競争的資金
競争的資金
競争的資金
競争的資金
競争的資金
競争的資金