Audio speaker and method for assembling an audio speaker

Details Audio speaker and method for assembling an audio speaker Audio speaker and method for assembling an audio speaker

2007-09-04

2007-09-04

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C029S594000

Reexamination Certificate

active

11001955

ABSTRACT:
An audio speaker includes a driver unit having a magnetic pole case defining a radial gap, a vibration system having a diaphragm and a voice coil where the vibration system is fixed to the drive unit and the voice coil is movably mounted into the radial gap, and a residual magnetic fluid layer disposed on the surfaces of one or more of the magnetic pole case and the voice coil where an air gap exists between the voice coil and the magnetic pole case.

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patent: 4742887 (1988-05-01), Yamagishi
patent: 5243662 (1993-09-01), Sogn et al.
patent: 5335287 (1994-08-01), Athanas
patent: 5757946 (1998-05-01), Van Schyndel

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