| Project/Area Number |
07455231
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Architectural environment/equipment
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| Research Institution | University of Tokyo |
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Principal Investigator |
TACHIBANA Hideki University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (80013225)
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| Co-Investigator(Kenkyū-buntansha) |
YANO Hiroo Chiba Institute of Technology, Department of Computer Science, Associate Profess, 情報工学科, 助教授 (70114692)
SAKAMOTO Shinichi University of Tokyo, Institute of Industrial Science, Associate Assistant, 生産技術研究所, 助手 (80282599)
佐藤 史明 (財)建設工学研究会, 主任研究員
日高 新人 東京大学, 生産技術研究所, 教務職員 (30218721)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥6,100,000 (Direct Cost: ¥6,100,000)
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| Keywords | public space / environmental acoustics / noisiness / sound field simulation / 地下街 / アトリウム / 模型実験 / 音響シミュレーション / たたみ込み演算 |
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| Research Abstract |
Basic investigations on the acoustical conditions in various types of public spaces such as railway stations, airport terminals, underground commercial areas were made by field measurement and laboratory experiments. This research project started on 1995 based on the preliminary studies on acoustic environments in public spaces made for several years.
This research consists of two main contents : Physical investigations and psychological experiments. At first, the field measurements of acoustic environmental conditions were performed at three areas in the underground spaces around the JR Yokohama Station, in which the actual environmental noise was measured at daytime and the architectural acoustic indices (reverberation time, sound pressure level distribution and etc.) were measured in midnight. Based on the measurement results, the relationship between the architectural conditions and the acoustic characteristics were investigated.
In order to investigate the psycho-acoustical impression in public space, a new sound field simulation technique has been developed in this study, in which a 3-dimensional sound receiving system consisting of six directional microphones and a multi-channel reproduction system set in an anechoic room are used. By using this technique and the data obtained in the actual fields, two kinds of subjective hearing tests on noisiness and easiness of hearing of public address system were performed and the relationships between the psycho-acoustical attributes and the architectural and acoustic conditions in the spaces were investigated.
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