Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1978-09-28
1978-12-05
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181146, 181151, 181156, H04R 128
Patent
active
041287380
ABSTRACT:
A compact loudspeaker system adapted for the reproduction of sound at minimum distortion. Two small diameter direct radiator loudspeakers and a matching crossover network are mounted in a common enclosure having a short non-folded transmission line completely filled with randomly oriented non-woven fibers, said fibers having a single installed density within range of 12 to 30 ounces per cubic foot. The first of these speakers, a bass/mid range unit is acoustically coupled to one end of the fiber filled transmission line by exposing the speaker radiator rear surface to the line while the second speaker, a high frequency unit, is acoustically isolated from the transmission line by encapsulating the speaker radiator rear surface in a housing integral with the second speaker. A port, located at the end of the transmission line, acoustically couples said line to the atmosphere.
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Abstract of U. S. Patent Application 637,670, filed Dec. 28, 1945, H. F. Olsen et al., Made Public Nov. 14, 1950, "Sound Translating Device."
Funk-Technik, vol. 30, No. 6, p. 136, "The `London` Ribbon Loudspeaker," Anon, Mar. 1975.
Rhodes Alex
Stellar George G.
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