Multiple voice-coil cone-driver

Details Multiple voice-coil cone-driver Multiple voice-coil cone-driver

2006-04-04

2006-04-04

Le, Huyen (Department: 2646)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S402000, C381S406000

Reexamination Certificate

active

07024014

ABSTRACT:
A multiple voice-coil cone-driver for driving a loudspeaker includes a first voice-coil, and a second voice-coil coupled in parallel to the first voice-coil. Together, the first and second voice-coils in parallel are characterized by a baseline frequency response with an upper threshold frequency. In addition, at least one additional voice-coil (e.g., a third voice-coil) is coupled in parallel to the first and second voice-coils. The additional voice-coil(s), in conjunction with the first and second voice-coils, provide an enhanced frequency response in comparison to the baseline frequency response. One aspect of the enhanced frequency response is that it has an extended upper threshold frequency compared to the baseline frequency response, providing for more accurate reproduction of music and speech from a single speaker.

REFERENCES:
patent: 4612420 (1986-09-01), Nieuwendijk
patent: 6175637 (2001-01-01), Fujihira et al.
patent: 6208742 (2001-03-01), Garcia et al.
patent: 0 137 549 (1987-02-01), None
patent: 0 810 810 (1997-03-01), None

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