Microphone array system and method for sound acquisition
US8923529B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2009 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Oct 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone array system (16) for sound acquisition from multiple sound sources in a reception space surrounding a microphone array (18) that is interfaced with a beamformer module (28) is disclosed. The microphone array (18) includes microphone transducers (22) that are arranged relative to each other in N-fold rotationally symmetry, and the beamformer includes beamformer weights that are associated with one of a plurality of spatial reception sectors corresponding to the N-fold rotational symmetry of the microphone array (18). Microphone indexes of the microphone transducers (18) are arithmetically displaceable angularly about the vertical axis during a process cycle, so that a same set of beamformer weights is used selectively for calculating a beamformer output signal associated with any one of the spatial reception sectors. A sound source location module (30) is also disclosed that includes a modified steered power response sound source location method. A post filter module (32) for a microphone array system is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.