ELECTROACOUSTIC TRANSDUCER, ELECTRONIC DEVICE, METHOD FOR CONVERTING ELECTRONIC SOUND, AND METHOD FOR OUTPUTTING ACOUSTIC WAVE FROM ELECTRONIC DEVICE

Title:

ELECTROACOUSTIC TRANSDUCER, ELECTRONIC DEVICE, METHOD FOR CONVERTING ELECTRONIC SOUND, AND METHOD FOR OUTPUTTING ACOUSTIC WAVE FROM ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/077683

Kind Code:

A1

Abstract:

Disclosed is an electroacoustic transducer provided with: a vibrating membrane (21) which has a piezoelectric element; a magnetic circuit (20) which generates a magnetic force on the basis of a first electric signal, and which vibrates the vibrating membrane (21) by means of said magnetic force; and an adjustment means (31) which generates a second electric signal on the basis of the first electric signal, and which applies a voltage between both surfaces of the piezoelectric element on the basis of said second electric signal. The amplitude of the entire vibrating membrane (21) is enhanced by synchronizing the vibration of the magnetic force, which was generated by means of the magnetic circuit (20), with the vibration generated by applying a voltage to the piezoelectric element.

Inventors:

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

Application Number:

PCT/JP2010/007338

Publication Date:

June 30, 2011

Filing Date:

December 17, 2010

Export Citation:

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Assignee:

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

International Classes:

H04R23/02; H04R17/00

Foreign References:

JP2003259489A	2003-09-12
JPS63176099A	1988-07-20
JPS5494020A	1979-07-25
JPS63279700A	1988-11-16
JPS62221300A	1987-09-29
JPS56149900A	1981-11-19
JPS5799899A	1982-06-21
JPS62221300A	1987-09-29
JPH0888898A	1996-04-02

Other References: