Tunable recyclable headliner
US5892187A · kind A · utility
51Cited by
12References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Dec 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/172
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The sound attenuating device of the present invention is a bulk layer connected to a support member which forms a plurality of Helmholtz resonators. This invention is particularly useful in a vehicle where the bulk layer attenuates high frequency noise, i.e. above about 1000 Hz, while the resonators can be tuned across the device to absorb at different lower frequencies in different areas of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.