Acoustics – Auditorium
Patent
1976-03-09
1977-08-16
Tomsky, Stephen J.
Acoustics
Auditorium
181 33G, 181 33GB, E04B 186, G10K 1104
Patent
active
040420612
ABSTRACT:
A noise barrier having a large magnitude of transmission loss is disclosed which is formed of a cell-box-type noise barrier comprising (A) a hollow cell-type block having a perforated sound-absorbing plate disposed on the side confronting the source of noise and a sound-insulating plate disposed on the opposite side relative to said perforated sound-absorbing plate and incorporating therein a sound-absorbing material and (B) a free-spacing plate disposed opposite said sound-insulating plate across a space and held in position by the medium of an elastic member, with a free air layer intervening between said free-spacing plate and said sound-insulating plate. Also disclosed is a method for insulating noise by providing a free-spacing plate at a distance from a noise source in such a way as to create a free air layer.
REFERENCES:
patent: 2085436 (1937-06-01), Maurer
patent: 2276788 (1942-03-01), Norris
patent: 3234996 (1966-02-01), King et al.
patent: 3295273 (1967-01-01), Wehe, Jr.
patent: 3592289 (1971-07-01), Aysta et al.
patent: 3656576 (1972-04-01), Gubela
patent: 3866001 (1975-02-01), Kleinschmidt et al.
Showa Koji K. K.
Tomsky Stephen J.
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