Steerable and variable first-order differential microphone array

Details Steerable and variable first-order differential microphone array Steerable and variable first-order differential microphone array

1997-04-03

2000-03-21

Lee, Ping

Electrical audio signal processing systems and devices

Directive circuits for microphones

381 66, H04R 300

Patent

active

060411279

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.

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