Bone vibrating speaker using the diaphragm and mobile phone...

Details Bone vibrating speaker using the diaphragm and mobile phone... Bone vibrating speaker using the diaphragm and mobile phone...

2003-07-24

2008-12-16

Ensey, Brian (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Body contact wave transfer

C381S326000

Reexamination Certificate

active

07466833

ABSTRACT:
In a bone conduction speaker, a body has a shape of a cylinder, and a vibrating plate is inserted to a mastoid to close an upper opening portion of the body. An auxiliary vibrating plate is inserted to the mastoid under the vibrating plate. A vibrating coil is attached on a lower side of the auxiliary vibrating plate. A speaker plate is fixed at an inner central portion of the body, and a ring type magnet is fixed on the speaker plate. An edge portion of a yoke is fixed on the ring type magnet and a central portion of the yoke has a protrusion which protrudes in the inside direction of a central hole of the speaker plate. An acoustic vibrating plate is fixed at a lower portion of the body, and an acoustic coil is fixed on the acoustic vibrating plate.

REFERENCES:
patent: 6483917 (2002-11-01), Kang et al.
patent: 6850138 (2005-02-01), Sakai
patent: 58182398 (1983-10-01), None
patent: WO 02/25989 (2002-03-01), None

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