Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1980-09-19
1983-05-24
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
1791155ES, 1791155PS, 179116, 179181R, 181150, 181171, H04R 718, H04R 1102
Patent
active
043852106
ABSTRACT:
An electro-acoustic transducer using thin, lightweight, planar diaphragms driven by strategically located, coil-driven, high-energy, permanent magnets. A framework maintains the diaphragms in substantially co-planar relationship a predetermined distance from and parallel to a rear support wall. The diaphragms include at least one hinged woofer diaphragm and a foam-supported tweeter diaphragm. The small, high energy movable permanent magnets are attached to the rear surface of each movable diaphragm. Cooperating with each movable magnet is a respective, stationary electromagnetic coil with a crossover network directing the incoming signal to the appropriate coils, thereby placing the magnets and attached diaphragms into cooperating fore and aft motion. The frontal acoustical waves produced by each woofer constructively interfere to augment low frequency response. The tweeter construction provides wide frontal dispersion of high frequency acoustical waves. Woofer backwaves are attenuated before emerging along the rear support wall and the tweeter backwave is vented into a rear isolative chamber.
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Publication Unknown, Date Unknown, "Panel Speaker Designs" Grieg & Schoengold, pp. 36-38 (Radio-Electronics).
Electro-Magnetic Corporation
Stellar George G.
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