Microphone-array apparatus and method for extracting desired signal
US4536887A · kind A · utility
87Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Oct 7, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic signal is received by a plurality of microphone elements and their outputs are delayed by delay means and weighted and summed up by weighted summation means, obtaining a noise-reduced output. A fictitious desired signal is electrically generated and the weighting values of the weighted summation means is determined based on the fictitious desired signal and the outputs of the microphone elements when receiving substantially only noises.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.