JPS5758499A - Electret capacitor type electroacoustic converter - Google Patents

Electret capacitor type electroacoustic converter

Info

Publication number
JPS5758499A
JPS5758499A JP13236080A JP13236080A JPS5758499A JP S5758499 A JPS5758499 A JP S5758499A JP 13236080 A JP13236080 A JP 13236080A JP 13236080 A JP13236080 A JP 13236080A JP S5758499 A JPS5758499 A JP S5758499A
Authority
JP
Japan
Prior art keywords
electrode
terminals
metallic
major planes
capacitor type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13236080A
Other languages
Japanese (ja)
Other versions
JPS5911240B2 (en
Inventor
Shigeru Fujiwara
Sakae Tamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13236080A priority Critical patent/JPS5911240B2/en
Priority to EP81107385A priority patent/EP0048902A3/en
Priority to CA000386656A priority patent/CA1197605A/en
Publication of JPS5758499A publication Critical patent/JPS5758499A/en
Publication of JPS5911240B2 publication Critical patent/JPS5911240B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

PURPOSE:To uniform the surface potential distribution in a fixed electrode and to reduce high frequency distortion, by providing a fixed electrode consisting of electret having metallic layer with both major planes opposing to an oscillation electrode. CONSTITUTION:Fixed electrodes 1, 1' consisting of electrets 12, 12' having metallic layers 11, 11', 13, 13' are provided on the major planes opposing to an oscillation electrode 12. As the metallic layes 11, 11', 13, 13' provided on both major planes of the electrets 12, 12', metallic layers made of Al, Cu, or stainless steel are used, and terminals 4, 4' for DC voltage application are provided at the side opposing to the oscillation electrode 2 in the metallic layers 11, 11', 13, 13'. Terminals 5, 5' for AC signal input/otput are provided for the fixed electrodes 1, 1', current and voltage are applied by using the terminals 4, 4', the surface potential distribution in the fixed electrodes 1, 1' is made uniform, allowing to reduce the distortion at high frequency regions.
JP13236080A 1980-09-25 1980-09-25 Electret capacitor type electroacoustic transducer Expired JPS5911240B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP13236080A JPS5911240B2 (en) 1980-09-25 1980-09-25 Electret capacitor type electroacoustic transducer
EP81107385A EP0048902A3 (en) 1980-09-25 1981-09-18 Method for manufacturing electret device and condenser type electro-acoustic transducer having electrets
CA000386656A CA1197605A (en) 1980-09-25 1981-09-25 Method for manufacturing electret device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13236080A JPS5911240B2 (en) 1980-09-25 1980-09-25 Electret capacitor type electroacoustic transducer

Publications (2)

Publication Number Publication Date
JPS5758499A true JPS5758499A (en) 1982-04-08
JPS5911240B2 JPS5911240B2 (en) 1984-03-14

Family

ID=15079537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13236080A Expired JPS5911240B2 (en) 1980-09-25 1980-09-25 Electret capacitor type electroacoustic transducer

Country Status (1)

Country Link
JP (1) JPS5911240B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120002826A1 (en) * 2010-06-30 2012-01-05 Tsung-Hung Wu Electret electroacoustic transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120002826A1 (en) * 2010-06-30 2012-01-05 Tsung-Hung Wu Electret electroacoustic transducer

Also Published As

Publication number Publication date
JPS5911240B2 (en) 1984-03-14

Similar Documents

Publication Publication Date Title
JPS5758499A (en) Electret capacitor type electroacoustic converter
CA2024351A1 (en) Differential protective relay apparatus
TW367517B (en) Gaseous insulation switch device
JPS553281A (en) Elastic surface wave filter
JPS55162410A (en) Ozonizer
JPS5467792A (en) Elastic surface wave element
EP0140130A3 (en) Process and apparatus for preparing semiconductor layer
JPS5713783A (en) Bimorph piezoelectric element
JPS56166613A (en) Voltage to current converting circuit
JPS56132010A (en) Piezoelectric filter
JPS5694814A (en) Elastic surface wave device
JPS5527769A (en) Elastic surface wave converter
JPS5671472A (en) Driving method of piezoelectric porcelain transformer
JPS56141512A (en) Capacity type displacement converter
JPS6443077A (en) Traveling surge motor
JPS5713782A (en) Bimorph piezoelectric element
JPS55106380A (en) Watch with radio
JPS5752214A (en) Structure body of surface acoustic wave resonator
JPS56128011A (en) Surface elastic wave filter
JPS5523706A (en) Switching regulator
JPS5486320A (en) Compound system speaker
JPS57127918A (en) Thin film magnetic head
JPS53112769A (en) Electrostatic capacity type displacement converter
JPS57157614A (en) Piezoelectric resonator using width and length vibration and filter
JPS5453993A (en) Non-crystal magnetostriction transducer