Method and device for controlling wrinkles in a vibratile diaphragm
US4215249A · kind A · utility
1Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1978 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Apr 25, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R31/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device for significantly improving the efficiency and sensitivity of an electroacoustical transducer. A relatively inelastic vibratile diaphragm is preformed to the shape of a mating backplate prior to the time it is actually mated to said backplate. By such preforming, the efficiency and sensitivity reducing effects from a wrinkled transducer diaphragm are minimized in that said wrinkles move to a diaphragm region where they have no effect on transducer sensitivity when the backplate is subsequently mated to said diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.