Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1978-08-18
1980-10-28
Olms, Douglas W.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
179 1E, 181155, H04R 502, H04R 102
Patent
active
042309050
ABSTRACT:
The stereophonic system includes a pair of right and left channel sub-bass converters in addition to the usual right and left channel main speakers. The main speakers are spaced apart from each other at one end of a space and the two sub-bass converters are spaced apart from each other at the opposite end of the space. The preferred position of a listener is generally between the two sub-bass converters. Each sub-bass converter comprises an inner housing defining a first chamber and a larger outer housing which is inverted over the inner housing, so that a second chamber is defined between the two housings, above and around the inner housing. The lower end of the inner housing serves as a floor contacting base. The outer housing has a 360.degree. extending lower edge which is spaced above the level of said base, so that a generally downwardly directed, 360.degree. extending outlet for the sub-bass converter, leading out from the second chamber, is formed near the base of the sub-bass converter. An upwardly directed vibrating cone type low frequency speaker is located within the inner housing. Such speaker has a peripheral mounting portion bordering a speaker opening in the top wall of the inner housing.
REFERENCES:
patent: D233763 (1974-11-01), Crum
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patent: 3947635 (1976-03-01), Frankman
Japanese Publication No. 21697/69, Sonny.
Churchill Edward J.
Crum Ronald J.
Barnard Delbert J.
Olms Douglas W.
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