System and method for reducing non linear electrical distortion in an electroacoustic device
US6526149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Jun 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a system and method for reducing non-linear electrical distortion in an electroacoustic device. Specifically, the present invention relates to a system and method for reducing spatially dependent electrical distortion, for example, distortion caused by differences in electrical displacement between a conductive membrane and a counter electrode at different parts of the conductive membrane. The system and method for reducing non-linear electrical distortion has particular application in condenser microphones comprising, for example, a conductive diaphragm receptive to sound, and a backplate electrically coupled thereto to generate an electrical output. In one exemplary embodiment, the present invention provides an electroacoustic system comprising a conductive membrane and a counter electrode electrically coupled to the conductive membrane. A face of the counter electrode facing the conductive membrane is curved. The curve is selected to reduce spatially dependant variations in electrical displacement between the counter electrode and the conductive membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.