Modal silencer

Details Modal silencer Modal silencer

1993-08-30

1995-11-28

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181296, E04F 1704

Patent

active

054710200

ABSTRACT:
In order to abate unwanted noise having as its source a stack or duct of large cross-sectional dimension, a venturi is installed in the duct such as to suppress at least the highest order modes of sound propagation in the stack or duct. The invention is most useful with stacks or ducts having a cross-sectional dimension exceeding 50 cm.

REFERENCES:
patent: 1964845 (1934-07-01), Dietze
patent: 3511336 (1970-05-01), Rink
patent: 3759157 (1973-09-01), Larkfeldt et al.
patent: 4361206 (1982-11-01), Tsai
patent: 4368799 (1983-01-01), Wagner
patent: 4690245 (1987-09-01), Gregorich et al.
patent: 4713097 (1987-12-01), Grawi et al.
patent: 5174113 (1992-12-01), Deville
patent: 5183976 (1993-02-01), Plemons
patent: 5273127 (1993-12-01), Burg

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