Microphone with frequency pre-emphasis
US4815560A · kind A · utility
37Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Dec 4, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/48
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stepped frequency microphone particularly adapted to a hearing aid application provides a stepped frequency response characteristic relative to frequency, and has a low-pass sonic attenuator for providing to the undriven side of the microphone diaphragm a sonic counterpressure which at low frequencies substantially cancels ambient sound pressure delivered to the drive side of the diaphragm, the attenuator reducing this counterpressure at elevated frequencies to provide accentuated high frequency response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.