Soundproofing assembly and a part comprising a wall which if covered with said assembly
US7201253B2 · kind B2 · utility
19Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2003 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Oct 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/168
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A soundproofing assembly intended, in particular, to soundproof a motor vehicle. The inventive assembly includes four stacked layers, consisting respectively of: a first layer having an air resistance of between 500 and 2,000 N·m−3.s; a second porous, acoustic spring-type layer having a resistivity of between 10,000 N·m−4.s and 50,000 N·m−4.s; a third viscoelastic, airtight, heavy mass-type layer having a density that is greater than or equal to 1,500 Kg/m3 and a surface density of between 0.2 Kg/m2 and 9 Kg/m2; and a fourth porous, acoustic spring-type layer having a resistivity of between 10,000 N·m−4.s and 50,000 N·m−4.s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.