Sleep-inducing/interrupting audio system

Details Sleep-inducing/interrupting audio system Sleep-inducing/interrupting audio system

1976-02-24

1977-09-13

Weldon, Ulysses

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

58 24R, 330130, 340384E, G04B 3712

Patent

active

040473775

ABSTRACT:
For sleep promotion and for sleeper awakening an audio system including a wide band audio frequency generator is provided with an output speaker, volume and tone selectors, a time-alarm signalling system, and means for connection with a house alarm system to sound the time-alarm when the house alarm system is actuated; operation is suspended when the alarm system is actuated for any reason; volume control in response to ambient noise is also provided.

REFERENCES:
patent: 2304095 (1942-12-01), Hull
patent: 2575990 (1951-11-01), Augustadt
patent: 2616971 (1952-11-01), Kannenberg
patent: 3290442 (1966-12-01), Suganuma
patent: 3567863 (1971-03-01), Morrissey
patent: 3873921 (1975-03-01), Petrinec

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