Hydraulic noise attenuators

Details Hydraulic noise attenuators Hydraulic noise attenuators

1986-03-12

1987-06-09

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181249, 181252, 138 30, F01N 110

Patent

active

046713808

ABSTRACT:
A hydraulic noise attenuator of the type utilizing a tubular casing having an inlet and outlet end, a perforated tube extending through the casing, the ends of the tube being secured in the inlet and outlet ends of the casing, portions of the tube adjacent at least the secured outlet end thereof, being encompassed by sound-absorbing material means being provided to reflect sound waves against the sound-absorbing material to enhance the attenuation at the lower frequencies.

REFERENCES:
patent: 1494066 (1924-05-01), Pasche-Huguenin
patent: 2194163 (1940-03-01), Dahl
patent: 2875787 (1959-03-01), Evans
patent: 3605815 (1971-09-01), Forell
patent: 4356886 (1982-11-01), Daude et al.

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