Title:
ACOUSTIC GENERATOR, ACOUSTIC GENERATING DEVICE, AND ELECTRIC DEVICE
Document Type and Number:
Japanese Patent JP2014039094
Kind Code:
A
Abstract:
To improve sound pressure on a low frequency region.
An acoustic generator includes: a film 3; a frame member 5 provided in a peripheral part of the film 3; a piezoelectric element 1 provided in the film 3 within the frame member 5; and a resin layer 20 filled within the frame member 5 so that the piezoelectric element 1 is embedded. The resin layer 20 has an uneven pattern on a surface. Thereby, rigidity of the resin layer 20 is lowered compared with a case where the surface of the resin layer 20 is flat and smooth; a first resonance frequency that a vibration body, which is composed of the film 3 and the resin layer 20, united with the piezoelectric element 1, has is reduced.
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Inventors:
HIRAYAMA TAKESHI
FUKUOKA SHUICHI
KUSHIMA NORIYUKI
NINOMIYA HIROSHI
FUKUOKA SHUICHI
KUSHIMA NORIYUKI
NINOMIYA HIROSHI
Application Number:
JP2012179048A
Publication Date:
February 27, 2014
Filing Date:
August 10, 2012
Export Citation:
Assignee:
KYOCERA CORP
International Classes:
H04R17/00
Attorney, Agent or Firm:
Hiroaki Sakai