Stereo microphone

Details Stereo microphone Stereo microphone

1989-08-30

1990-08-07

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Stereo sound pickup device

381170, 381172, H04R 5027

Patent

active

049474375

ABSTRACT:
A stereo microphone that delivers "Right" and "Left" output signals from the sound field at a single point in space. A small, light, ball-like sound-sensing element is loosely suspended so that it is free to move in any direction in a plane. Directional components of its displacements are sensed and translated into electrical analog signals, which are then processed to provide separate stereo outputs. The sound-sensing element may be suspended on an optical fiber and its displacements sensed by a quad photodetector, whose four outputs are added and subtracted in certain combinations to derive the stereo outputs.

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