Soundproofing assembly, use for soundproofing enclosed spaces, and method for making same
US7789197B2 · kind B2 · utility
8Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2006 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jul 7, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1031
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.