| Project/Area Number |
22656122
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Niigata University |
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Principal Investigator |
IWASE Teruo 新潟大学, 自然科学系, 教授 (30114391)
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| Co-Investigator(Renkei-kenkyūsha) |
YOSHIMURA Junnichi (財)小林理学研究所, 建築音響研究室, 室長 (00142050)
SUGIE Satoshi (財)小林理学研究所, 建築音響研究室, 室員 (00280644)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,210,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | 多孔質材料 / 吸音率 / 粒子速度 / 音響計測 / 軽量2重壁 / 音響屈折 / 遮音 / 音響伝搬定数 / グラスウール / コインシデンス効果 |
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| Research Abstract |
In the case of oblique sound incidence into porous media from the air, phenomenon of sound refraction has been guessed because sound velocity is lower in the porous media than that in the air. Main subject of this study was sound refraction, then the phenomenon wad verified by acoustical experiment on the oblique sound incidence into glass wool of typical porous material from the air. Moreover, establishment of quantitative grasping method of insertion effect of glass wool on the sound insulation of lightweight double leaf wall. It was confirmed that the insertion effects corresponded to the sound attenuation according to propagation length along the sound refracted path in porous material in double leaf wall.
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