发明名称 |
Porous soundproof structural body and method of manufacturing the structural |
摘要 |
A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2a. The board thickness, hole diameter and open area ratio of the internal plate 2 are set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes 2a, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.
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申请公布号 |
US2004191474(A1) |
申请公布日期 |
2004.09.30 |
申请号 |
US20030481003 |
申请日期 |
2003.12.17 |
申请人 |
YAMAGIWA ICHIRO;TANAKA TOSHIMITSU;UEDA HIROKI;UTSUNO HIDEO;SAKATANI TORU;SUGIMOTO AKIO |
发明人 |
YAMAGIWA ICHIRO;TANAKA TOSHIMITSU;UEDA HIROKI;UTSUNO HIDEO;SAKATANI TORU;SUGIMOTO AKIO |
分类号 |
G10K11/16;G10K11/168;G10K11/172;(IPC1-7):B32B3/10 |
主分类号 |
G10K11/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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