Condenser microphone
US4392025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | May 27, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A condenser microphone in which a back electrode, disposed oppositely to the rear surface of a diaphragm, and a circuit assembling plate disposed oppositely to the rear surface of the back electrode, are held in a holder. Electronic circuit elements are attached to only one surface of the circuit assembling plate, and the other surface thereof is faced toward the rear surface of the back electrode with a predetermined distance provided therebetween. A back chamber, defined by a space between the back electrode and the circuit assembling plate, and enclosed by the holder improves the characteristics of microphone frequency response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.