Electro-acoustic transducers

Details Electro-acoustic transducers Electro-acoustic transducers

1987-10-05

1990-03-06

Fuller, B. R.

Acoustics

Plural diaphragm sound sources

181146, 181153, 181163, 181171, 181199, H05K 500

Patent

active

049057880

ABSTRACT:
An electro-acoustic transducer is formed of a loudspeaker enclosure having a form of revolution about an axis each end of which is closed by a loudspeaker. The two loudspeakers are mounted back to back in the axis of the enclosure, one of the loudspeakers being fed from an electric power source and being in this sense "active", whereas the other loudspeaker is "passive" in that it receives no electric supply, its movements resulting from the rear wave of the active loudspeaker. The enclosure is maintained vertically along its axis of revolution, and, on the other hand, the side wall of the enclosure is formed of a flexible material, unlikely to resonate with the front and rear waves of the loudspeakers.

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patent: 3750878 (1973-08-01), Pyle, Jr.
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patent: 4420061 (1983-12-01), Levy
patent: 4580654 (1986-04-01), Hale
patent: 4673057 (1987-06-01), Glassco

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