Arcuately tensioned piezoelectric diaphragm microphone
US4379211A · kind A · utility
16Cited by
0References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1980 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Oct 14, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/222
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lightweight piezoelectric microphone using a metallized piezoelectric diaphragm arcuately bowed by a boss on a slotted baffle plate held in close parallel proximity to the diaphragm is disclosed. Slotted Helmholtz resonators provide frequency response shaping and wide band noise cancellation. Electrical contact between the diaphragm and an electrical conductor is provided by a conductive, elastic material compressed by parts of the microphone housing, into electrical contact with the conductor and a metallized side of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.