| 摘要 |
<p>An electro-acoustic transducer using thin, light-weight, planar diaphragms (13, 14) driven by strategically located, coil driven, high-energy, permanent magnets (41). A framework (12) maintains the diaphragms (13, 14) in substantially co-planar relationship a predetermined distance from and parallel to a rear support wall (16). The diaphragms (13, 14) include at least one hinged woofer diaphragm (13) and a foam-supported tweeter diaphragm (14). The small, high energy movable permanent magnets (41) are attached to the rear surface of each movable diaphragm (13, 14). Cooperating with each movable magnet (41) is a respective, stationary electromagnetic coil (29) with a cross-over network directing the incoming signal to the appropriate coils, thereby placing the magnets (41) and attached diaphragms (13, 14) 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.</p> |
