ELECTROACOUSTIC TRANSDUCER - NEC CASIO MOBILE COMM LTD

Title:

ELECTROACOUSTIC TRANSDUCER

Document Type and Number:

WIPO Patent Application WO/2012/090433

Kind Code:

A1

Abstract:

Provided is an electroacoustic transducer equipped with: an oscillating device (10) which outputs acoustic waves (30) from a first vibratile surface, and which outputs acoustic waves (32) of an opposite phase of the acoustic waves (30) from a second vibratile surface on the reverse surface from the first vibratile surface; a waveguide (40) which is provided upon the first vibratile surface and which has an open end (46); a waveguide (50) which is provided upon the second vibratile surface and which has an open end (56) facing the same direction as the open end (46); and an acoustic wave filter (80) provided upon the waveguide (50) for attenuating the acoustic waves (32).

Inventors:

KISHINAMI YUICHIRO (JP)
ONISHI YASUHARU (JP)
KOMODA MOTOYOSHI (JP)
KAWASHIMA NOBUHIRO (JP)
MURATA YUKIO (JP)
KURODA JUN (JP)
SATOU SHIGEO (JP)

Application Number:

PCT/JP2011/007100

Publication Date:

July 05, 2012

Filing Date:

December 20, 2011

Export Citation:

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Assignee:

NEC CASIO MOBILE COMM LTD (JP)
KISHINAMI YUICHIRO (JP)
ONISHI YASUHARU (JP)
KOMODA MOTOYOSHI (JP)
KAWASHIMA NOBUHIRO (JP)
MURATA YUKIO (JP)
KURODA JUN (JP)
SATOU SHIGEO (JP)

International Classes:

H04R1/34; H04R3/00; H04R17/00

Domestic Patent References:

WO2008084806A1

2008-07-17

Foreign References:

JPH11262084A	1999-09-24
JPS6468099A	1989-03-14
JPH0698384A	1994-04-08
JPH01119200A	1989-05-11
JP2002345077A	2002-11-29
JP2008113194A	2008-05-15
JP2000036993A	2000-02-02
JP2009046236A	2009-03-05
JP2010091871A	2010-04-13

Other References: