Hearing aid mechanism

Details Hearing aid mechanism Hearing aid mechanism

2006-12-07

2008-12-30

Ensey, Brian (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S324000

Reexamination Certificate

active

07471805

ABSTRACT:
A hearing aid includes a sound input device, and a speaker, wherein the speaker includes a compartment with magnet suspended in a fluid containing magnetic particles and wherein a coil wrapped around the compartment or in close proximity thereto excites the magnet to vibrate causing pressure waves to vibrate a diaphragm proximal to the magnet.

REFERENCES:
patent: 5640457 (1997-06-01), Gnecco et al.
patent: 5987146 (1999-11-01), Pluvinage et al.
patent: 6654476 (2003-11-01), Guenther
patent: 7132597 (2006-11-01), Hosler
patent: 2004/0184631 (2004-09-01), Hosler

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