Pressure gradient type microphone apparatus with acoustic termin

Details Pressure gradient type microphone apparatus with acoustic termin Pressure gradient type microphone apparatus with acoustic termin

1994-08-03

1996-06-11

Brinich, Stephen

Electrical audio signal processing systems and devices

Binaural and stereophonic

Stereo sound pickup device

381 91, H04R 500

Patent

active

055264301

ABSTRACT:
In a small-sized pressure gradient type microphone apparatus, a plurality of omni-directional microphone units are encased within a microphone holder. A plurality of acoustic passages having first and second ends are provided within the microphone holder for coupling the sound inlets of the plurality of omni-directional microphone units respectively to an outer space of the microphone holder. The second ends of the acoustic passages opened to the outer space of the microphone holder are arranged to be apart from each other at distances larger than distances between the sound inlets of the corresponding microphone units coupled at the first ends of the acoustic passages.

REFERENCES:
patent: 4070547 (1978-01-01), Dellar
patent: 4633498 (1986-12-01), Warnke et al.
patent: 4819270 (1989-04-01), Lombardo
patent: 4836326 (1989-06-01), Wehner et al.

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