JPS57107700A - Electrostatic type ultrasonic wave oscillator - Google Patents

Electrostatic type ultrasonic wave oscillator

Info

Publication number
JPS57107700A
JPS57107700A JP18440080A JP18440080A JPS57107700A JP S57107700 A JPS57107700 A JP S57107700A JP 18440080 A JP18440080 A JP 18440080A JP 18440080 A JP18440080 A JP 18440080A JP S57107700 A JPS57107700 A JP S57107700A
Authority
JP
Japan
Prior art keywords
film
spring
tool
back side
ultrasonic wave
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
JP18440080A
Other languages
Japanese (ja)
Inventor
Susumu Katayama
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP18440080A priority Critical patent/JPS57107700A/en
Publication of JPS57107700A publication Critical patent/JPS57107700A/en
Pending 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

Abstract

PURPOSE:To suspend a vibration diaphragm without giving any interference to radiation of sound waves, by providing an oscillation film having a moving electrode at the back side of a fixed electrode with sound wave radiation holes and depressing this oscillation film via a film depressing tool depressed with a spring. CONSTITUTION:A vibration diaphragm 4 vapor deposited with a moving electrode 5 on one side is inserted and fixed between a film fixing tools 6a, 6b, and the assembly is inserted to a vacant chamber inside the forming with a fixed electrode 1. The tool 6b is depressed with a spring 7 from the back side, this spring 7 is provided between the back side of the tool 6b and a case 8 made of isolator to exert a pressure suspending the oscillation film 4.
JP18440080A 1980-12-25 1980-12-25 Electrostatic type ultrasonic wave oscillator Pending JPS57107700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18440080A JPS57107700A (en) 1980-12-25 1980-12-25 Electrostatic type ultrasonic wave oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18440080A JPS57107700A (en) 1980-12-25 1980-12-25 Electrostatic type ultrasonic wave oscillator

Publications (1)

Publication Number Publication Date
JPS57107700A true JPS57107700A (en) 1982-07-05

Family

ID=16152501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18440080A Pending JPS57107700A (en) 1980-12-25 1980-12-25 Electrostatic type ultrasonic wave oscillator

Country Status (1)

Country Link
JP (1) JPS57107700A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014322A (en) * 1987-03-04 1991-05-07 Hosiden Electronics Co., Ltd. Diaphragm unit of a condenser microphone, a method of fabricating the same, and a condenser microphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014322A (en) * 1987-03-04 1991-05-07 Hosiden Electronics Co., Ltd. Diaphragm unit of a condenser microphone, a method of fabricating the same, and a condenser microphone

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