Microphone array having a second order directional pattern
US7471798B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Aug 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A directional microphone system is disclosed, which comprises circuitry for low pass filtering a first order signal, and circuitry for high pass filtering a second order signal. The system further comprises circuitry for summing the low pass filtered first order signal and the high pass filtered second order signal. A method of determining whether a plurality of microphones have sufficiently matched frequency response characteristics to be used in a multi-order directional microphone array is also disclosed. For a microphone array having at least three microphones, wherein one of the microphones is disposed between the other of the microphones, a method of determining the arrangement of the microphones in the array is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.