Acoustic signal level limiter

Details Acoustic signal level limiter Acoustic signal level limiter

2007-04-03

2007-04-03

Pendleton, Brian T. (Department: 2615)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Peak limiting or pulsive noise compensation

C330S257000

Reexamination Certificate

active

09967677

ABSTRACT:
An acoustic signal level limiter provides a telephone handset/headset user protection against loud audible signals generated within a communications system. The acoustic signal limiter comprises an acoustic signal level attenuation circuit and at least one acoustic signal level relay circuit. Once activated, the acoustic signal level attenuation circuit creates an attenuation network that attenuates an electrical acoustic signal transmitted through the communications system. Acoustic signal level relay circuits are activated to further attenuate the electrical acoustical signal to prevent the acoustic signal level attenuation circuit from operating in a deep saturation mode and provide further hearing safety for the telephone headset/handset user. A fuse in series and “Zener Zap” shunting transistor diodes provide assured higher signal level protection.

REFERENCES:
patent: 3944944 (1976-03-01), Ellenbecker
patent: 4454479 (1984-06-01), Spires
patent: 4672664 (1987-06-01), Boeckmann
patent: 5940259 (1999-08-01), Robinson
patent: 6434243 (2002-08-01), Read

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