Noise reducing diffuser

Details Noise reducing diffuser Noise reducing diffuser

1997-07-29

1999-07-27

Dang, Khanh

Acoustics

Sound-modifying means

Combined

181224, 181233, F01N 100

Patent

active

059293969

ABSTRACT:
A noise reducing diffuser which reduces the sound energy created by a pressurized gas while it is being expelled through a nozzle. The diffuser consists of an elongated enclosure with openings at each end that is attached to the output of the gas nozzle. The dimensions of the enclosure, particularly its distance from the sound source, effective diameter and length, are chosen to specifically eliminate audible noise created by the escaping gas by conversion of a portion of the longitudinal component of the sound energy to an increased radial component that can then be dissipated by repeated contact with the wall of the elongated enclosure.

REFERENCES:
patent: 2820406 (1958-01-01), Argentieri
patent: 3061039 (1962-10-01), Peters
patent: 3568791 (1971-03-01), Luxton
patent: 3695388 (1972-10-01), Paxhia et al.
patent: 4244440 (1981-01-01), Matta et al.
patent: 4298088 (1981-11-01), Keller
patent: 4418788 (1983-12-01), Gorchev et al.
patent: 4872398 (1989-10-01), Shen
The Lee Company Technical Hydraulic Handbook, Axial Visco Jet, pp. 32 & 33, Lee Bender Jet, pp. 58 & 59.

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