Acoustics – Plural diaphragm sound sources – With sound-asborbing means
Patent
1988-06-17
1989-09-26
Fuller, B. R.
Acoustics
Plural diaphragm sound sources
With sound-asborbing means
181147, 181151, 181199, H05K 500
Patent
active
048693405
ABSTRACT:
Going inwardly from the outside, the walls of the housing comprise a multi-ply slab, one or more layers of elastomer coating, a plate of amorphous bitumen, and acoustic screens constituted by substantially contiguous parallel tubes which are filled with a solid material which is in the divided state and highly compacted, e.g. sand, or particles of graphite, or grains of silica. In addition, the enclosures include one or more blocks behind the loudspeakers and made of cellular foam with channels passing therethrough parallel to the axes of the loudspeakers.
REFERENCES:
patent: 1912454 (1933-06-01), Hutter
patent: 2986228 (1961-05-01), Rettinger et al.
patent: 4591020 (1986-05-01), Hruby, Jr.
patent: 4690244 (1987-09-01), Dickie
Japanese Abstracts 60-186191 for a Speaker Device.
Japanese Abstracts 56-165487 for a Cabinet for Acoustic Machinery.
Japanese Abstracts 57-155893 for a Speaker System.
Japanese Abstracts 61-150494 for a Cabinet for a Speaker.
Japanese Abstracts 57-116494 for a Box for a Speaker.
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