Stereo microphone unit
US5206910A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | May 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stereo microphone unit adapted to be installed in a video camera or the like, includes a cabinet, two nondirectional microphones disposed with a predetermined distance therebetween on respective walls of the cabinet for collecting an outside sound signal, delay circuits for delaying each output of the microphones by a time period corresponding to the predetermined distance, and signal subtractors for subtracting the output of the delay circuit relative to one microphone from the output of the other microphone. A stereo audio signal is provided only with regard to the output sound signal of any frequency lower than a predetermined frequency of 6 kHz or so.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.