Louver flow muffler

Details Louver flow muffler Louver flow muffler

1976-07-26

1978-09-05

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181273, 181275, F01N 100

Patent

active

041112792

ABSTRACT:
A muffler for lowering the exhaust gas noise level of combustion engines has a Helmholtz resonator chamber and a single straight tube member that is provided with a perforated portion outside said chamber large enough for full flow through it of all gas flowing through the muffler, one end of the tube extending into the resonator chamber and the tube diameter, chamber volume, and length of the tube between said one end and said perforated portion being related to and dependent upon each other in accordance with the Helmholtz formula so that the resulting Helmholtz system attenuates a predetermined frequency when the muffler is placed in an exhaust system at or near the pressure antinode of that frequency.

REFERENCES:
patent: 2357791 (1944-05-01), Powers
patent: 3589469 (1971-06-01), Hasui et al.

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