Title:
マイクロホンとその製造方法
Document Type and Number:
Japanese Patent JP4641217
Kind Code:
B2
Abstract:
A microphone that identifies the direction along which acoustic waves propagate with one diaphragm, and has superior durability is provided. The microphone includes a circular diaphragm supported at a center portion thereof. When the diaphragm receives acoustic waves, each position around the center thereof will vibrate with a phase depending upon the direction of the acoustic waves. First electrodes are arranged on one surface of the diaphragm and second electrodes are arranged facing corresponding first electrodes to form a first capacitor. Third electrodes are arranged on the other surface of the diaphragm and fourth electrodes are arranged facing corresponding third electrodes to form a second capacitor. A controller applies a voltage to the second capacitors so that the capacitance of the first capacitors will be constant and identifies the direction along which the acoustic waves propagate based on the difference in the voltages applied to each of the second capacitors.
Inventors:
Keiichi Shimaoka
Hirofumi Funabashi
Koichi Mitsushima
Toshiaki Nakagawa
Toshihiro Wakita
Shigeru Ando
Junki Ono
Hirofumi Funabashi
Koichi Mitsushima
Toshiaki Nakagawa
Toshihiro Wakita
Shigeru Ando
Junki Ono
Application Number:
JP2005167742A
Publication Date:
March 02, 2011
Filing Date:
June 08, 2005
Export Citation:
Assignee:
Toyota Central R & D Labs.
National University Corporation Tokyo University
National University Corporation Tokyo University
International Classes:
H04R3/00; H04R1/34
Domestic Patent References:
| JP2003028740A | ||||
| JP10308519A | ||||
| JP2003127100A |
Other References:
A Saito, N Ono, S Ando ,Micro gimbal diaphragm for sound source localization with mimicking Ormia Ochracea, SICE 2002. Proceedings of the 41st SICE Annual Conference,米国,2002年 8月 7日,vol.4,p2159-2162
Ono N, Saito A, Ando S,Design and experiments of bio-mimicry sound source localization sensor with gimbal-supported circular diaphragm ,TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003 ,IEEE,2003年,vol.1,p935-938
小野順貴他2名,ヤドリバエを模倣した微分検出型音源定位センサの理論と実験,電子情報通信学会技術研究報告. SP, 音声,日本,社団法人電子情報通信学会,2002年 3月22日,VOl101,NO.745 ,p31-36
Ono N, Saito A, Ando S,Design and experiments of bio-mimicry sound source localization sensor with gimbal-supported circular diaphragm ,TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003 ,IEEE,2003年,vol.1,p935-938
小野順貴他2名,ヤドリバエを模倣した微分検出型音源定位センサの理論と実験,電子情報通信学会技術研究報告. SP, 音声,日本,社団法人電子情報通信学会,2002年 3月22日,VOl101,NO.745 ,p31-36
Attorney, Agent or Firm:
Kaiyu International Patent Office