Microphone array with physical beamforming using omnidirectional microphones
US7840013B2 · kind B2 · utility
29Cited by
15References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2004 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Mar 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/401
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An array of microphones is provided wherein the microphones are positioned at the ends of cavities within a diffracting structure. The cavity depth, width, and shape are optimised to provide high directivity without grating lobes, at frequencies for which the distance between microphones is greater than half the acoustic wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.