Title:
ELECTROSTATIC SOUND WAVE GENERATION DEVICE AND ELECTROSTATIC SPEAKER
Document Type and Number:
WIPO Patent Application WO/2020/174524
Kind Code:
A1
Abstract:
[Problem] To provide an electrostatic sound wave generation device and an electrostatic speaker that make it less likely that dust, water, humidity, or the like will enter the interior of the device, and make it possible to reduce consumed power and increase sound quality. [Solution] A flat fixed electrode 11 has a through hole 11a penetrating through the thickness of the electrode. A vibrating body 12 that is in the form of a plate or film and a vibrating electrode 13 are arranged on one surface side and another surface side, respectively, of the fixed electrode 11, and are provided so as to be movable in the thickness direction with respect to the fixed electrode 11. A connecting member 14 connects the vibrating body 12 and the vibrating electrode 13 through the through hole 11a of the fixed electrode 11 so that the vibrating body 12 and the vibrating electrode 13 move in the same direction. An audio signal inputting means 16 is provided so as to be able to apply a voltage to the fixed electrode 11, the vibrating body 12, and the vibrating electrode 13 so that: electrostatic attraction between the fixed electrode 11 and the vibrating body 12 causes the vibrating body 12 to move; and electrostatic attraction between the fixed electrode 11 and the vibrating electrode 13 causes the vibrating electrode 13 to move.
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Inventors:
JOERG FROEMEL (JP)
TANAKA SHUJI (JP)
OHTAKA KOICHI (JP)
TANAKA SHUJI (JP)
OHTAKA KOICHI (JP)
Application Number:
PCT/JP2019/007012
Publication Date:
September 03, 2020
Filing Date:
February 25, 2019
Export Citation:
Assignee:
UNIV TOHOKU (JP)
International Classes:
H04R19/02
Foreign References:
| US20180255402A1 | 2018-09-06 | |||
| JP2012080531A | 2012-04-19 | |||
| JPS51155637U | 1976-12-11 | |||
| US20110033079A1 | 2011-02-10 |
Attorney, Agent or Firm:
SUDA Atsushi et al. (JP)
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