Sound attenuation system and related method

Details Sound attenuation system and related method Sound attenuation system and related method

1998-04-15

1999-09-14

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181214, B64D 3302

Patent

active

059526211

ABSTRACT:
The present invention is noise attenuation system and related method for suppressing noise generated by a noise source, such as a jet engine, contained in a housing. An impedance device is positioned in the housing to attenuate the amplitude of sound waves generated by the noise source propagating in one direction and to create a reflected sound wave. The reflected sound wave is out of phase with the sound waves propagating from the noise source away from the impedance device. The reflected sound wave destructively interferes with this sound wave to attenuate the amplitude.

REFERENCES:
patent: 3437173 (1969-04-01), Ehrich
patent: 3542152 (1970-11-01), Adamson et al.
patent: 4215536 (1980-08-01), Rudolph

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