Electroacoustic transducer using diaphragm and method for...

Details Electroacoustic transducer using diaphragm and method for... Electroacoustic transducer using diaphragm and method for...

2006-07-10

2010-10-26

Le, Huyen D (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

C381S430000

Reexamination Certificate

active

07822216

ABSTRACT:
An electroacoustic transducer has an cup chamber and a diaphragm made of deformable electrostrictive polymer, which is attached to an opening of the chamber. The electroacoustic transducer also has first and second adaptive electrode layers formed on a front surface and a rear surface of the diaphragm, across which audio signal voltage biased by a direct-current biased voltage is applied. The first and second adaptive electrode layers have shapes that are adjustable according to a change in a shape of the diaphragm. The diaphragm is formed to make maximum a difference in air pressure of the front surface and the rear surface of the diaphragm, thereby forming any one of concave and convex shapes thereof.

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U.S. Appl. No. 11/485,967, filed Jul. 14, 2006, Ohashi.

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