Double-resonator micro-speaker assemblies and methods for...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure

Reexamination Certificate

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C381S353000, C181S160000

Reexamination Certificate

active

07840023

ABSTRACT:
Micro-speaker assemblies and mobile terminals including micro-speaker assemblies are provided. The micro-speaker assemblies include a micro-speaker positioned in a housing. A first forward tuning volume is positioned adjacent a front face of the micro-speaker. A passageway extends from the first forward tuning volume to an opening in the housing. A second forward tuning volume in fluid communication with the passageway is positioned at a location between the first forward tuning volume and the opening in the housing. The second forward tuning volume, the first forward tuning volume and the passageway define a double-resonator that tunes a frequency response of the micro-speaker. Methods for tuning micro-speakers are also provided.

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Japanese Office Action (2 pages) corresponding to Japanese Patent Application No. 2004-540071; Mailing Date: Oct. 31, 2008.
International Search Report for PCT/US03/28665 dated Jan. 27, 2004.

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