Ear microphone
US4696045A · kind A · utility
32Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1985 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jun 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An ear microphone includes a bimorph piezoelectric transducer mounted on a PC board having an amplifier therein and surrounded by a helically wound spring. The piezoelectric transducer and spring are potted in a semi-soft potting compound which is formed in a shape adapted to be inserted into an external auditory ear canal to permit bone conduction to the microphone element. A cable is coupled to the amplifier through which a signal can be withdrawn for processing by electronic equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.