JPS59171300A - Condenser microphone - Google Patents

Condenser microphone

Info

Publication number
JPS59171300A
JPS59171300A JP4494583A JP4494583A JPS59171300A JP S59171300 A JPS59171300 A JP S59171300A JP 4494583 A JP4494583 A JP 4494583A JP 4494583 A JP4494583 A JP 4494583A JP S59171300 A JPS59171300 A JP S59171300A
Authority
JP
Japan
Prior art keywords
diaphragm
metallic
holes
back electrode
spacer
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.)
Pending
Application number
JP4494583A
Inventor
Takayoshi Saito
Masayuki Tone
Tsutomu Yano
Original Assignee
Matsushita Electric Ind 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP4494583A priority Critical patent/JPS59171300A/en
Publication of JPS59171300A publication Critical patent/JPS59171300A/en
Application status is Pending legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00Electrostatic transducers
    • H04R19/04Microphones

Abstract

PURPOSE:To prevent a resonance frequency from being lowered at a high ambient temperature by inserting a metallic thin film spacer having lots of through- holes and an insulator between a metallic diaphragm and a back electrode. CONSTITUTION:The condenser microphone consists of a diaphragm 6 made of metallic foil, a spacer 9 comprising metallic thin film having plural through- holes 7, the metallic back electrode 5 and an insulating film 10. In this constitution, a DC bias voltage is impressed between the diaphragm 6 and the back electrode 5 and a sound pressure P is applied to the diaphragm 6, then the length of the through-holes 7 is changed and a capacitance between the diaphragm 6 and the back electrode 5 is changed and this is extracted as a voltage change. Since a metallic foil having a less expansion coefficient than a plastic film by nearly 1 digit is used in this way, no deflection is produced in a high ambient temperature and the resonance frequency is not decreased. Since the spacer 9 is also the metallic thin film, the holes 7 are formed with high precision and the control of the resonance frequency is easy.
JP4494583A 1983-03-17 1983-03-17 Condenser microphone Pending JPS59171300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4494583A JPS59171300A (en) 1983-03-17 1983-03-17 Condenser microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4494583A JPS59171300A (en) 1983-03-17 1983-03-17 Condenser microphone

Publications (1)

Publication Number Publication Date
JPS59171300A true JPS59171300A (en) 1984-09-27

Family

ID=12705618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4494583A Pending JPS59171300A (en) 1983-03-17 1983-03-17 Condenser microphone

Country Status (1)

Country Link
JP (1) JPS59171300A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0973149A2 (en) * 1998-07-16 2000-01-19 Massachusetts Institute Of Technology Ultrasonic transducers
JP2003018696A (en) * 2001-06-29 2003-01-17 Azden Corp Electret capacitor microphone
US6775388B1 (en) 1998-07-16 2004-08-10 Massachusetts Institute Of Technology Ultrasonic transducers
US8027488B2 (en) 1998-07-16 2011-09-27 Massachusetts Institute Of Technology Parametric audio system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0973149A2 (en) * 1998-07-16 2000-01-19 Massachusetts Institute Of Technology Ultrasonic transducers
EP0973149A3 (en) * 1998-07-16 2000-12-27 Massachusetts Institute Of Technology Ultrasonic transducers
US6775388B1 (en) 1998-07-16 2004-08-10 Massachusetts Institute Of Technology Ultrasonic transducers
US8027488B2 (en) 1998-07-16 2011-09-27 Massachusetts Institute Of Technology Parametric audio system
US9036827B2 (en) 1998-07-16 2015-05-19 Massachusetts Institute Of Technology Parametric audio system
JP2003018696A (en) * 2001-06-29 2003-01-17 Azden Corp Electret capacitor microphone

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