Ceramic microphone
US4559418A · kind A · utility
7Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1983 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Oct 5, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A ceramic microphone is described which comprises a diaphragm for receiving sound waves, a thin ceramic plate attached to the diaphragm for transducing the sound waves to electric signals, and a plurality of electrodes on each of the opposite sides of the ceramic plate, the plurality of electrodes being polarized so that each of a pair of the electrodes faced across the ceramic plate forms a capacitor and the opposite-polarity electrodes of each of the capacitors are serially connected each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.