Sound-absorbing material, production method for sound-absorbing material, and sound-absorbing structure
US7789196B2 · kind B2 · utility
4Cited by
5References
6Claims
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Assignee
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Key dates
| Filing date | Jul 30, 2008 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Nov 24, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R13/0212
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3×104 N·s/m4 or more, a Young's modulus E of 1.2×103 to 2.0×104 N/m2, and a loss factor δ of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.