Teleconferencing acoustic transducer

Details Teleconferencing acoustic transducer Teleconferencing acoustic transducer

1983-09-21

1985-11-26

Brown, Thomas W.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 87, 181158, 179 18BC, H04R 140

Patent

active

045555982

ABSTRACT:
A directional acoustic transducer includes a plurality of acoustic paths each having first and second ends. The second end of each path terminates in the atmosphere. An electroacoustic device is attached to an acoustic cavity and the acoustic path first ends are coupled to the said acoustic cavity through an acoustic arrangement adapted to produce a predetermined transducer directional response pattern.

REFERENCES:
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patent: 2228886 (1941-01-01), Olson
patent: 2262146 (1941-11-01), Massa
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patent: 2514344 (1950-07-01), Slaymaker
patent: 2739659 (1956-03-01), Daniels
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patent: 3573400 (1971-04-01), Sessler
patent: 3715500 (1973-02-01), Sessler
patent: 3793489 (1974-02-01), Sank
patent: 4264790 (1981-04-01), Zlevor
patent: 4311874 (1982-01-01), Wallace
Olsen, "Line Microphones", Proceedings of the Institute of Radio Engineers, vol. 27, 1939, pp. 438-446.

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