Active sound absorber
US5267321A · kind A · utility
100Cited by
6References
11Claims
0Family size
Inventor
Key dates
| Filing date | Nov 19, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The Active Sound Absorber of the invention is based on an electroacoustical transceiver defined as a bilateral electroacoustical transducer acting as both a diaphragm actuator and motion sensor, and an associated mutual inductance discriminator, in a electroacoustical positive feedback system. Selected embodiment of such a system is an unvented hearing aid where the Active Sound Absorber combats the occlusion effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.