Mute circuit for a microphone

Details Mute circuit for a microphone Mute circuit for a microphone

2011-08-23

2011-08-23

Faulk, Devona E (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

C381S113000, C381S091000, C381S122000

Reexamination Certificate

active

08005241

ABSTRACT:
An apparatus having a microphone and a mute circuit (not shown in detail here) operable to be actuated by a rotating door assembly. The apparatus provides a mute circuit suitable to mute the audio microphone when the rotating door assembly is in a closed position and unmute the audio microphone when the rotating door assembly is not in the closed position. Additionally, the mute circuit is impervious to generating audible disturbances in the microphone signal when the rotating assembly door is rotated between open and closed positions. This advantageously allows for the microphone to essentially transition to off when the rotating door assembly is closed and transition to on when the rotating door assembly is open and do so without additional audio disturbance.

REFERENCES:
patent: 5175759 (1992-12-01), Metroka et al.
patent: 5918188 (1999-06-01), Doran
patent: 6778814 (2004-08-01), Koike
patent: 2003/0064687 (2003-04-01), Sugino et al.

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