Microphone unit

Details Microphone unit Microphone unit

1978-05-08

1981-04-21

Moffitt, James W.

179180, 179187, H04R 1904

Patent

active

042634849

ABSTRACT:
A telephone transmitter in which a cavity is formed in front of a vibrating membrane of the microphone transmitter to thereby reduce wind-noise. The cross-sectional area and volume of the cavity are larger respectively than the cumulative total cross-sectional area and volume of the apertures formed in the mouthpiece of the telephone transmitter. At least one of the apertures may be formed to serve a shielding function to prevent an air stream from directly blowing onto the vibrating membrane, thereby further reducing wind-noise pickup by the transmitter.

REFERENCES:
patent: 2205670 (1940-06-01), Pye
patent: 2697141 (1954-12-01), Smith
patent: 2791641 (1957-05-01), Pye
patent: 3414689 (1968-12-01), Gummel et al.
patent: 3830988 (1974-08-01), Mol et al.
patent: 3944756 (1976-03-01), Lininger
patent: 4070741 (1978-01-01), Djuric
Electrical Communication vol. 50, No. 2, pp. 123-126, 1975 Tabalba.

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