Silencer for ventilation ducts

Details Silencer for ventilation ducts Silencer for ventilation ducts

1975-07-18

1977-07-12

Franklin, Lawrence R.

Acoustics

Auditorium

24270, 98DIG10, 138149, 181 42, F01N 124

Patent

active

040348261

ABSTRACT:
A silencer having a tubular configuration which can be interposed in a duct and form a part of the duct walls. The silencer has an inner perforate wall and an outer imperforate wall. The annular space between the two walls is filled with acoustical sound absorbing materials. The outer imperforate wall is adapted for quick opening to permit easy replacement of the sound absorbing materials.

REFERENCES:
patent: 2287867 (1942-06-01), Daiger
patent: 2552847 (1951-05-01), Farr et al.
patent: 2804095 (1957-08-01), Schauenburg
patent: 2958387 (1960-11-01), Greff
patent: 3097410 (1963-07-01), Lincoln
patent: 3564671 (1971-02-01), Straus
patent: 3633956 (1972-01-01), Angell

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