Sound attenuating system

Details Sound attenuating system Sound attenuating system

1991-09-10

1994-09-13

Peng, John K.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, H04B 1500

Patent

active

053475852

ABSTRACT:
A sound attenuating system for attenuating sound from a sound source. The system comprises a main conduit through which the sound from the sound source propagates; a first device for defining in the conduit at least one passive acoustic reflecting surface; and a second device for defining in the conduit a plurality of active acoustic reflecting surfaces. The active acoustic reflecting surfaces are of a type which permits a partial permeation of sound therethrough.

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patent: 4815139 (1989-03-01), Eriksson et al.
Eghtesadi, et al., "The Tight-Coupled Monopole Active Attenuator in a Duct", Noise Control Engineering Journal, Jan.-Feb. 1983, vol. 20, pp. 16-20.

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