Method and apparatus for controlling noise

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

F - Mech Eng,Light,Heat,Weapons

01

N

172/20

F01N 1/00 (2006.01) E01F 8/00 (2006.01) G10K 11/175 (2006.01)

Patent

CA 1226526

ABSTRACT OF THE DISCLOSURE 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 passage- way through the body portion with a plurality of chambers extending into the body portion from both sides of the passage- way, the chambers and the passageway being sized to cause a 180° phase lag in a sound passing through the passageway, thus causing destructive interference with sound passing over the barrier.

462993

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