High efficiency broadband acoustic resonator and absorption panel
US4421201A · kind A · utility
46Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Sep 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A high efficiency broadband acoustic resonator and absorption panel used for reducing engine noise from high bypass fan jet engines mounted on an aircraft. The panel uses a single layer of cellular honeycomb core with a pair of parallel acoustic septums formed internally in the core for attenuating high and medium frequency sounds during all engine operations as well as the low frequency combination tone and "buzzsaw" noise experienced during high power aircraft takeoff and cutback engine power settings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.