Title:
機械電気変換素子及びその製造方法
Document Type and Number:
Japanese Patent JP4810661
Kind Code:
B2
Abstract:
A microphone-capsule encompasses a vibrator (vibrating plate) 14 implemented by a conductor having a flat vibration surface, a dielectric-polarization plate 13 which is defined by a flat first principal surface facing to the vibration surface of the vibrating plate 14 and a second principal surface facing parallel to the first principal surface and in which polarization directions are aligned, a back electrode 12 joined to the second principal surface of the dielectric-polarization plate 13, and an induced-charge measuring unit (21, 9) configured to measure the charges induced between the vibrating plate 14 and the back electrode 12, in association with the displacement of the vibration surface. Here, the induced-charge measuring unit (21, 9) embraces an amplifier (FET) 21 connected to the back electrode 12 and an output circuit 9 connected to the amplifier (FET) 21.
Inventors:
Kensuke Kageyama
Application Number:
JP2006124251A
Publication Date:
November 09, 2011
Filing Date:
April 27, 2006
Export Citation:
Assignee:
Saitama University
International Classes:
G01H11/06; H01G7/02; H04R19/01; H04R19/04; G01P15/125
Domestic Patent References:
| JP2004135223A | ||||
| JP2006041575A | ||||
| JP2006050314A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Suzuki Isobe
Suzuki Isobe