Microphone mixer
US5673327A · kind A · utility
Inventor
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An automatic microphone control system particularly suited to controlling a small, predetermined number of microphones. A representation of the level of a microphone signal is compared individually to the level representations of each of the other microphones to determine if the microphone should receive a gating trigger. If the microphone level compares favorably to each of the other microphones, and a noise adaptive threshold comparison criterion is also satisfied, then the microphone receives a gating trigger. This triggers a gate ON action for the microphone, which is held at least 0.4 seconds by a one-shot and also locked ON unless a gate ON action is initiated by any other microphone. The circuitry for a two-microphone system particularly suited to a lectern application is powerable by a conventional phantom-powering balanced microphone preamplifier input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.