Sound absorptive material
US5304415A · kind A · utility
29Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/268
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sound absorptive material has powder particles having a sound absorption characteristics at a low frequency and generally supported in a vibratable state by a porous support, whereby the sound absorptive material can be increased in the sound absorption coefficient in the low frequency range while maintaining the absorptive material to be thin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.