发明名称 |
SOUNDPROOFING ASSEMBLY, USE FOR SOUNDPROOFING ENCLOSURES, AND METHOD FOR MAKING SAME |
摘要 |
A soundproofing assembly includes stacked layers in the form of a first set of layers (36) having good resistance to the passage of air, and a second set of layers (24) with mass-spring function including a layer (28) having a heavy viscoelastic mass and a spring type layer (26); the first set of layers includes a layer (36) of a foam with open cells of high porosity, high tortuosity and good resistance to the passage of air, the layer (36) having, owing to its high tortuosity, excellent sonic absorption properties at medium and high frequencies. The invention is useful for soundproofing motor car passenger compartments. |
申请公布号 |
EP1899949(A1) |
申请公布日期 |
2008.03.19 |
申请号 |
EP20060778823 |
申请日期 |
2006.07.07 |
申请人 |
FAURECIA AUTOMOTIVE INDUSTRIE |
发明人 |
DUVAL, ARNAUD;MARCEL, VALERIE;RONDEAU, JEAN-FRANCOIS;CHARBONNIER, PATRICE |
分类号 |
G10K11/168;B29D99/00 |
主分类号 |
G10K11/168 |
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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