Title:
ELECTRET CAPACITOR HEADPHONE UNIT
Document Type and Number:
Japanese Patent JP2015082723
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high-output electric capacitor headphone.SOLUTION: An electric capacitor headphone unit includes diaphragms 3 and fixed electrodes 2 disposed to face the diaphragms 3 and having an electric layer 23. The fixed electrodes 2 are disposed on both sides of the diaphragms 3, and an audio signal is inputted between both the sides of the fixed electrodes 2. Each fixed electrode 2 has an insulating plate 21, electrode plates 22 independently disposed on both surfaces of the insulating plate 21, and an electric material formed to cover the entire fixed electrode including the electrode plate 22 and the insulating plate 21. The two diaphragms 3 are disposed in parallel to each other, and the fixed electrodes 2 are disposed with each diaphragm 3 interposed therebetween. The electric material of each fixed electrode 2 located at least on the opposite side of the diaphragm 3 is electric-charged to form the electric layer 23. The electric layer 23 of each fixed electrode 2 synchronously drives the two diaphragms 3 in the same direction by an audio signal being inputted to the electrode plate 22 of each fixed electrode 2.
Inventors:
AKINO YUTAKA
Application Number:
JP2013219189A
Publication Date:
April 27, 2015
Filing Date:
October 22, 2013
Export Citation:
Assignee:
AUDIO TECHNICA KK
International Classes:
H04R19/01; H04R1/10
Domestic Patent References:
| JPS58117799A | 1983-07-13 | |||
| JPS5090320A | 1975-07-19 | |||
| JPS5629600A | 1981-03-24 |
Attorney, Agent or Firm:
Yoshiyuki Ishibashi