Acoustics – Auditorium
Patent
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
Franklin Lawrence R.
H. H. Robertson Company
Keck Harry B.
Manias George E.
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