Tunable sound absorbing and air filtering attenuating device
US6789646B2 · kind B2 · utility
17Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24496
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Acoustical attenuating devices (52) and method of forming them. The attenuating devices (52) include an exterior layer (64), a sound absorption layer (66), and multiple perforated layers (68) coupled to the sound absorption layer (66). The perforated layers (68) include a perforated structural layer (70) and a perforated substrate layer (72). The perforated structural layer (70) and the perforated substrate layer (72) provide structural stiffness and define multiple resonating tubes (88) that attenuate sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.