Electromagnetic transducer and portable communication device

Details Electromagnetic transducer and portable communication device Electromagnetic transducer and portable communication device

2007-03-06

2007-03-06

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S412000

Reexamination Certificate

active

09965966

ABSTRACT:
An electromagnetic transducer includes a magnetic member, a suspension for supporting the magnetic member at a central portion of the suspension, a diaphragm connected to the suspension, a magnet for generating magnetic flux on the magnetic member, and a coil for generating alternating magnetic flux on the magnetic member.

REFERENCES:
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patent: 5956622 (1999-09-01), Lee
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patent: 11-557794 (1999-02-01), None
patent: WO 99/39843 (1999-08-01), None
patent: WO 00/32013 (2000-06-01), None
European Search Report dated May 7, 2003.
Chinese Office Action dated Nov. 7, 2003 (5 pages).

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