Noise absorption system having active acoustic liner
US5919029A · kind A · utility
26Cited by
18References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1996 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Nov 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/32291
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention is embodied in an aircraft engine noise absorption system having a resonator cavity for absorbing incident noise except for a residue noise signal having a predominant frequency, the system comprising an actuator providing an actuator acoustic signal, a noise sensor for sensing the predominant frequency, and a controller for setting the actuator acoustic signal to the predominant frequency and varying one of a phase and an amplitude of the actuator acoustic signal to decrease the residue noise signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.