2011 Fiscal Year Final Research Report
Development of an advanced room acoustics design scheme based on diffuseness control
| Project/Area Number |
21360275
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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 | The University of Tokyo |
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Principal Investigator |
SAKUMA Tetsuya 東京大学, 大学院・新領域創成科学研究科, 准教授 (80282995)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAI Keiji 熊本大学, 大学院・自然科学研究科, 准教授 (90284744)
OSHIMA Takuya 新潟大学, 大学院・自然科学系, 助教 (40332647)
YASUDA Yosuke 神奈川大学, 工学部, 准教授 (90456187)
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| Research Collaborator |
TSUCHIYA Yuzo 東京大学, 大学院・新領域創成科学研究科, 博士
LEE Hyojin 東京大学, 大学院・新領域創成科学研究科, 博士
EDA Kazushi 東京大学, 大学院・新領域創成科学研究科, 博士
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| Project Period (FY) |
2009 – 2011
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| Keywords | 建築音響 / 室内音場 / 残響 / 吸音 / 音響拡散 |
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| Research Abstract |
In room acoustics design, a general methodology regarding reverberation time and room shape has been established, however, details of wall surface and interior finish have been empirically designed. In this research, an index of diffusivity of wall surface,"scattering coefficient" was introduced, developing two measurement methods, and providing a database for a variety of wall structures. Furthermore, a new reverberation theory for rectangular rooms was developed incorporating surface diffusivity, and energy decay in non-diffuse sound field was clarified by the theory, numerical simulation and scale model experiment. Additionally, auditory effect of installing diffuse surface was examined by using an auralization system.
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