Steerable and variable first-order differential microphone array
US6041127A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1997 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Apr 3, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first-order differential microphone array with a fully steerable and variable response pattern. One illustrative embodiment of the present invention comprises a microphone array consisting of 6 small pressure-sensitive omnidirectional microphones flush-mounted on the surface of a 3/4" diameter rigid nylon sphere. The microphones are advantageously located on the surface at points where included octahedron vertices contact the spherical surface. By selectively combining the three Cartesian orthogonal pairs with scalar weightings, a general first-order differential microphone beam (or a plurality of beams) is realized which can be directed to any angle (or angles) in three-dimensional space. The microphone array may find use in surround sound recording/playback applications and in virtual reality audio applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.