Air intake noise suppressor

Details Air intake noise suppressor Air intake noise suppressor

1990-03-12

1991-05-21

Brown, Brian W.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181255, F02M 3500

Patent

active

050167286

ABSTRACT:
An air intake noise suppressor for a snowmobile engine disposed on the intake side of a carburetor has an enclosure with a front face having apertures therein connected to the carburetor and a rear face canted relative to the front face. The rear face has an integrally formed frustoconical extension for permitting air to flow into the enclosure. The frustoconical extension extends into the enclosure and the enclosure has a irregular bottom wall providing additional reflective surfaces inside the enclosure. Sound emanating from the carburetor enters the enclosure through the apertures and is reflected and entrapped therein unit it is attenuated. The small amount of sound that may escape the enclosure through the frustoconical extension is either attenuated in a juxtaposed enclosure formed by a shroud or directed through louvers down and away to either side of the driver.

REFERENCES:
patent: 3835956 (1974-09-01), Kishira
patent: 4093039 (1978-06-01), Moore et al.
patent: 4109751 (1979-08-01), Kabele
patent: 4136756 (1979-01-01), Kawamura
patent: 4782912 (1988-11-01), Wandless

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