Microphone with non-symmetrical directivity pattern

Details Microphone with non-symmetrical directivity pattern Microphone with non-symmetrical directivity pattern

1985-05-17

1987-08-04

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

381155, 381158, 381159, H04R 1904, H04R 120

Patent

active

046851372

ABSTRACT:
A microphone having unique polar response characteristics has a virtual axis of maximum pickup sensitivity which is angularly displaced from its physical horizontal longitudinal axis. Forward and rearward movement of a diaphragm is sensed by a sensing element mounted in spaced relationship to a rear side of the diaphragm. A substantially enclosed cavity is formed between the diaphragm rear side and the sensing element, with a non-symmetrical arrangement of at least one aperture for permitting sound pressure waves to enter said cavity, so that the polar response curve of the microphone in a horizontal plane is angularly displaced about a line perpendicular to the microphone's horizontal longitudinal axis.

REFERENCES:
patent: 4117275 (1978-09-01), Miyanaga et al.
patent: 4258235 (1981-03-01), Watson
patent: 4268725 (1981-05-01), Nakawaga et al.
patent: 4456796 (1984-06-01), Nakawaga et al.
Miura, Kenzo, Variable Acoustical Network for Microphone", National Technical Report, vol. 16, No. 3, Jun. 1970.

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