Electromagnetic transducer with asymmetric diaphragm

Details Electromagnetic transducer with asymmetric diaphragm Electromagnetic transducer with asymmetric diaphragm

2007-02-13

2007-02-13

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S404000, C381S423000

Reexamination Certificate

active

10334752

ABSTRACT:
An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be realized. The asymmetric cone has a perimeter OD at which a surround may be coupled, and an ID at which a bobbin or spacer may be coupled. The center of the ID is not coincident with the center of the OD. The transducer further includes a stabilization mechanism for reducing rocking of the diaphragm assembly. The stabilization mechanism may include mass balancing of the diaphragm and/or adjustments to the location or symmetry of the suspension components.

REFERENCES:
patent: 3111189 (1963-11-01), Scholl
patent: 3180945 (1965-04-01), Suzuki
patent: 3334195 (1967-08-01), Ashworth
patent: 3464514 (1969-09-01), Kazukiyo et al.
patent: 3483946 (1969-12-01), Sotome
patent: 3570626 (1971-03-01), Mochida et al.
patent: 4821330 (1989-04-01), Pfleiderer
patent: 6442282 (2002-08-01), Azima et al.

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