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US Patent 7460679 Flat panel speaker system with a coated diaphragm

Patent 7460679 was granted and assigned to Panasonic on December, 2008 by the United States Patent and Trademark Office.

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Patent abstract

A speaker system having a structure in which the room surrounding the first diaphragm and the room adjacent to the second diaphragm are acoustically coupled. The second diaphragm has coating on a surface. Applying the coating to the second diaphragm enhances the reliability and performance of the speaker system. Besides, the diversely definable geometry of the diaphragm allows an electronic device employing the speaker system or the speaker module to have flexibility in design.

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