Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent
1984-12-20
1988-05-03
Ng, Jin F.
Electrical audio signal processing systems and devices
Directive circuits for microphones
181179, 381155, 381169, 381182, H04R 140, H04R 102
Patent
active
047425482
ABSTRACT:
A second order gradient microphone with unidirectional sensitivity pattern is obtained by housing each of two commerically available first order gradient microphones centrally within a baffle. The baffles have flat surfaces, are preferably square or circular and have parallel surfaces the two baffles being parallel to each other. The rotational axes of the microphones are arranged to coincide. The output signal from one of the microphones is subtracted from the delayed signal output of the other.
REFERENCES:
patent: 1735905 (1929-11-01), Martin et al.
patent: 1816618 (1931-07-01), Sklar
patent: 2301744 (1942-11-01), Olson
patent: 2396222 (1946-03-01), Foldy
patent: 3403223 (1968-09-01), Kleis et al.
patent: 3715500 (1973-02-01), Sessler et al.
patent: 3903989 (1975-09-01), Bauer
patent: 4009355 (1977-02-01), Paradowski
patent: 4122910 (1978-10-01), Wehner
patent: 4127749 (1978-11-01), Atoji et al.
patent: 4308425 (1981-12-01), Momose et al.
patent: 4399327 (1983-08-01), Yamamoto et al.
"Toroidal Microphones", by G. M. Sessler, J. E. West and M. R. Schroeder, Journal of the Acoustical Society of Am., vol. 46, No. 1 (Part 1), 1969, pp. 28-36.
Sessler Martin
West James E.
American Telephone and Telegraph Company
Bell Telephone Laboratories Incorporated
Byrd Danita R.
Ng Jin F.
Padnes David R.
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