Noise abatement muffler

Details Noise abatement muffler Noise abatement muffler

1988-01-11

1989-07-18

Fuller, B. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181231, 181239, 181258, 181264, 181272, F01N 110

Patent

active

048485136

ABSTRACT:
The invention is directed to a compact noise abatement muffler for an internal combustion engine. The muffler includes a housing having a plurality of chambers and fluid conductors for enabling the exhaust gases passing through the muffler to achieve at least 4 changes of direction of gas flow. The muffler of the invention is capable of reducing the sound pressure level of the exhaust gases between the input and exhaust ports of the muffler in the range of 10-25 decibels.

REFERENCES:
patent: 2618354 (1952-12-01), Hedrick
patent: 4056934 (1977-11-01), Mizusawa et al.
patent: 4700805 (1987-10-01), Tanaka et al.

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