Method and apparatus for controlling noise

Details Method and apparatus for controlling noise Method and apparatus for controlling noise

1984-02-23

1986-04-22

Hix, L. T.

Acoustics

Sound-modifying means

Sound absorbing fence or screen

181286, 181288, B64F 126

Patent

active

045836159

ABSTRACT:
The invention relates to a noise control device which is placed between a noise source and an area which is to be protected. The device includes at least one passageway through the body portion with a plurality of chambers extending into the body portion from both sides of the passageway, the chambers and the passageway being sized to cause a 180.degree. phase lag in a sound passing through the passageway, thus causing destructive interference with sound passing over the barrier.

REFERENCES:
patent: 4069768 (1978-01-01), Matsumoto et al.

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