Detection and control of diaphragm collapse in condenser microphones
US7548626B2 · kind B2 · utility
103Cited by
8References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2005 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Jan 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A condenser microphone is provided having a transducer element. A diaphragm has an electrically conductive portion. A back-plate has an electrically conductive portion. A DC bias voltage element is operatively coupled to the diaphragm and the back-plate. A collapse detection element is adapted to determine a physical parameter value related to a separation between the diaphragm and the back-plate. A collapse control element is adapted to control the DC bias voltage element based on the determined physical parameter value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.