Sound system with rate controlled, variable attenuation
US5204908A · kind A · utility
5Cited by
9References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1990 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Sep 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multichannel sound system comprising a plurality of microphones and loudspeakers. Rate controlled, variable attenuation of the audio signal is provided as a function of loudspeaker and microphone proximity. The use of optical isolators or analog switches with RC delay circuits to control the rate of attenuation eliminates objectionable switching transients. Selective attenuation of loudspeakers in proximity to active microphones eliminates audio feedback.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.