Frequency-selective sound transducer
US4885781A · kind A · utility
40Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1988 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Aug 19, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency-selective sound transducer comprised of a number of resonators with differing but sequential natural frequencies arranged in a first plane. A deformable membrane is arranged in a second plane, parallel to the first plane and in close proximity thereto. A small air gap thus exists between the first and second planes. Sound waves produce vibratory motion in the membrane, which motion is transmitted to the resonators by pressure waves generated by the membrane in the air between the membrane and resonators. The deflections of the resonators are converted into electrical signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.