04263484 is referenced by 18 patents and cites 7 patents.

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.

Title
Microphone unit
Application Number
5/903792
Publication Number
4263484
Application Date
May 8, 1978
Publication Date
April 21, 1981
Inventor
Masaharu Suzuki
Mizunami
JP
Yoshinobu Hisatsune
Nagoya
JP
Agent
George A Loud
Assignee
Aiphone
JP
IPC
H04R 19/04
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