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1. (WO2013145411) SPEAKER

Pub. No.:    WO/2013/145411    International Application No.:    PCT/JP2012/078858
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Thu Nov 08 00:59:59 CET 2012
IPC: H04R 19/02
Applicants: TOKAI RUBBER INDUSTRIES, LTD.
東海ゴム工業株式会社
Inventors: NAKANO Katsuhiko
中野 克彦
KONDO Mitsuyoshi
近藤 光由
Title: SPEAKER
Abstract:
To provide a speaker that can lower the applied voltage, have a smaller size, and have improved low-frequency characteristics. A speaker (1) is provided with a pair of front and back oscillation members (2,3) that have elastomer or resin dielectric layers (20,30) with insulation characteristics, front-side electrode layers (21,31) arranged on the front sides of the dielectric layers (20,30) and having conductivity, and back-side electrode layers (22,32) arranged on the back sides of the dielectric layers (20,30) and having conductivity; an interposed member (4) that is arranged between the pair of oscillation members (2,3) so that the front-side oscillation member (2) projects out on the front side and the back-side oscillation member (3) projects out on the back side; and a circuit (5) that transmits signals based on a voice, which is the reproduction target, to the pair of oscillation members (2,3) to mutually invert the phases to drive the pair of oscillation members (2,3).