Loudspeaker with phase correction

Details Loudspeaker with phase correction Loudspeaker with phase correction

1997-01-24

1998-07-07

Tran, Sinh

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

381202, 381158, 181185, 181159, H04R 2500

Patent

active

057780846

ABSTRACT:
The invention concerns a loudspeaker with a diaphragm which is electromagnetically induced to vibrate and is made of a central dome-shaped part and a conical part surrounding the latter, and a phase-correction device, consisting of a cone fixed in the housing with its base side matching the shape of the diaphragm and of two rings surrounding the cone concentrically, between which there are sound paths from the diaphragm into the sound outlet area. The object of the invention is to smooth out the transmission characteristic of the loudspeaker named initially and to enlarge the transmissible frequency band with simple means. The invention is characterised in that the ring surrounding the cone covers the boundary area between the dome and the cone of the diaphragm and on the side facing the diaphragm consists of two essentially conical surfaces, in that the axes of the sound paths between the cone and the neighboring ring and between the two rings are each aligned on a point on the loudspeaker axis, in that the sound paths become broader as the distance from the diaphragm increases, and in that the distances from the middle of the underside of the cone and from the middle of the surface of the rings facing the diaphragm to the sound paths are roughly the same.

REFERENCES:
patent: 4157741 (1979-06-01), Goldwater

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