Sound reproduction device or microphone
US6381337B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound reproduction device or a microphone comprising an enclosure (2) which is made of a substantially gas permeable flexible material and an electrical transducer (1) having at least one connection (4, 5) with the enclosure, and usually two connections, to impart movement to the enclosure where the device acts as a loudspeaker or to receive movement of the enclosure to generate an electrical signal where the device acts as a microphone. The enclosure is adapted to be stressed by internal pressure and forms a concavity centered on at least one of the connections with the electrical transducer, which concavity acts as an acoustic diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.