Blower noise silencer

Details Blower noise silencer Blower noise silencer

1999-09-22

2000-07-18

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181255, 181256, 181279, F01N 108

Patent

active

060893486

ABSTRACT:
A blower noise silencer comprises both an air turbulence stage and a noise absorption stage. The air turbulence stage includes a tubular screen enclosing a spiral vane wrapping around a central bore running through the air turbulence stage. The screen is surrounded by a hollow chamber. The noise absorption stage includes a hollow tubular screen surrounded by a chamber packed with sound dampening material. Each chamber in the silencer is closed other than through the screen that it surrounds whereas the screens open at one another and to opposite ends of the silencer to provide air flow movement into and out of the silencer.

REFERENCES:
patent: 3235003 (1966-02-01), Smith
patent: 4116303 (1978-09-01), Trudell

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