Method of broadband constant directivity beamforming for non linear and non axi-symmetric sensor arrays embedded in an obstacle
US7269263B2 · kind B2 · utility
60Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2003 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Mar 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/401
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for designing a broad band constant directivity beamformer for a non-linear and non-axi-symmetric sensor array embedded in an obstacle having an odd shape, where the shape is imposed by industrial design constraints. In particular, the method of the present invention provides for collecting the beam pattern and keeping the main lobe reasonably constant by combined variation of the main lobe with the look direction angle and frequency. The invention is particularly useful for microphone arrays embedded in telephone sets but can be extended to other types of sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.