Air buoyant piezoelectric polymeric film microphone
US4843275A · kind A · utility
79Cited by
13References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Jan 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Piezoelectric polymer film, when conformably adhered to inner or outer surfaces of an inflated balloon, functions as a microphone when the pressure of sound waves causes the film to vibrate and generate an electrical signal. The film may be in the form of an helical strip, individual strips electrically serially connected, or may itself form the inflatable material. A receiving device is electrically coupled with the electrodes formed on the piezoelectric film for processing the electrical signals generated by the vibrating piezoelectric polymer film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.