Silencer

Details Silencer Silencer

1990-02-27

1992-03-03

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116

Patent

active

050938649

ABSTRACT:
A silencer for deadening noise produced with drive of a motor-compressor disposed in a machine compartment of a refrigerator includes a data storage for previously storing sound wave data for every starting condition of the compressor, the sound wave data corresponding to sound waves produced by the compressor during a starting period thereof, the sound wave data being sound wave signals suitable for reducing sound from the compressor by the effect of sound wave interference, a control for determining the starting condition at the starting of the compressor, the control further reading out, from the data storage, the sound wave data corresponding to the determined starting condition, during the starting of the compressor, and a sound producer driven in response to the sound wave data read out from the data storage in the form of an electrical signal, thereby producing sound waves, the sound producer being disposed so that sound is directed to the interior of the machine compartment.

REFERENCES:
patent: 4366426 (1982-12-01), Turlej
patent: 4605888 (1986-08-01), Kim
patent: 4783817 (1988-11-01), Hamada et al.
Bleazey, J. C. "Electronic Sound Absorber", Apr. 1962.

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