Electrical audio signal processing systems and devices – Electro-acoustic audio transducer
Patent
1988-10-14
1990-12-04
Ng, Jin F.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
381158, 181159, 181185, G10K 1300, H04R 700
Patent
active
049759655
ABSTRACT:
A loudspeaker including a diaphragm for generating sound waves, the diaphragm being comprised of a peripheral conical portion adjacent to and surrounding a central domed portion, a flared horn adjacent to the diaphragm for receiving and projecting the sound waves into an acoustical space, a phasing plug intermediate the diaphragm and the horn defining sound pathways for impedance matching of the diaphragm and the horn. A plurality of sound channels extend through the phasing plug from the peripheral conical portion and the central domed portion of the diaphragm to the horn. The plurality of sound channels provide time compensated paths of equal length for the sound waves generated at both the peripheral conical portion and the central domed portion of the diaphragm. The present invention is also directed to a method of forming diaphragms for use in loudspeakers using a mold comprised of a hard die surface on one side and an opposing flexible die surface on the other side for applying uniform pressure to resin-impregnated multiple fabric layers, each layer being oriented with an angular offset of weave angle relative to adjacent layers, resulting in formation of a uniform mold of the multiple fabric layers.
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McGeary III M. Nelson
Ng Jin F.
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