Acoustics – Plural diaphragm sound sources – With sound-asborbing means
Patent
1980-12-24
1982-09-14
Hix, L. T.
Acoustics
Plural diaphragm sound sources
With sound-asborbing means
181147, 181156, H04R 128, H05K 500
Patent
active
043490840
ABSTRACT:
A speaker system includes a housing with four side panels and a back panel. A speaker mounting panel with a plurality of openings therethrough is positioned opposite the back panel to enclose the housing and define an acoustic chamber therein. A packed fibrous sheet material is attached to cover the interior surfaces of the side and back panels. A pair of unmatched drivers and a tweeter are mounted to the mounting panel so that each projects frontwave sound through one of the panel openings and backwave sound into the acoustic chamber. An open-ended cylindrical member defining an acoustic passageway is attached about the periphery of another mounting panel opening and extends part way into the acoustic chamber. An acoustic curtain extends between opposite side panels in a serpentine configuration about a portion of the periphery of the two drivers on one side of the curtain and the periphery of the cylindrical member on the other side of the curtain. The curtain extends from the mounting panel and terminates a spaced distance from the acoustic cover on the back panel for enabling backwave sound to travel around the acoustic curtain and out through the acoustic passageway. The region behind the drivers and tweeter is filled with a loose fibrous dacron and a dacron curtain whose thickness can be adjusted.
REFERENCES:
patent: 3729061 (1973-04-01), Tamura
patent: 4128738 (1978-12-01), Gallery
Cohen, "The Diffusion-8 Enclosure", Radio and Television News, Mar. 1954, pp. 55, 150.
Hix L. T,.
Tarcza Thomas H.
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