Acoustics – Plural diaphragm sound sources – With sound-asborbing means
Patent
1986-07-02
1989-02-07
Fuller, Benjamin R.
Acoustics
Plural diaphragm sound sources
With sound-asborbing means
181148, 181151, 181199, H05K 500
Patent
active
048025518
ABSTRACT:
For years efforts have been made to construct acoustically completely dead loudspeaker cabinets. Interest has of course been taken in a neutral reproduction of the signals transmitted to the loudspeaker system, without the acoustic image being changed by cabinet resonances or other irrelevant sources of noise. According to the invention one or several of the cabinet walls are constituted by a hollow body (2), into the interior of which a foamed plastic material mixed with grains of comparatively high specific gravity is injected. These grains are sound and vibration absorbing, so that the walls are practically without resonances, and the weight is simultaneously reduced.
REFERENCES:
patent: 3652360 (1972-03-01), Hartman et al.
patent: 4592444 (1986-06-01), Perrigo
patent: 4596305 (1986-06-01), Jagborn
Fuller Benjamin R.
Jamo Hi-Fi A/S
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