JPS52409A - High sensitivity, low noise underwater mike - Google Patents

High sensitivity, low noise underwater mike

Info

Publication number
JPS52409A
JPS52409A JP7571375A JP7571375A JPS52409A JP S52409 A JPS52409 A JP S52409A JP 7571375 A JP7571375 A JP 7571375A JP 7571375 A JP7571375 A JP 7571375A JP S52409 A JPS52409 A JP S52409A
Authority
JP
Japan
Prior art keywords
mike
low noise
high sensitivity
underwater
noise underwater
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
JP7571375A
Other languages
Japanese (ja)
Inventor
Masatada Fukushima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7571375A priority Critical patent/JPS52409A/en
Publication of JPS52409A publication Critical patent/JPS52409A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/02—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To reduce noises and increase sensitivity of an underwater mike by equallizing a static pressure of a liquid inside the mike to that of an external medium so as to offset drags acting on two series-system bimorph piezoelectric elements.
JP7571375A 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike Pending JPS52409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7571375A JPS52409A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7571375A JPS52409A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Publications (1)

Publication Number Publication Date
JPS52409A true JPS52409A (en) 1977-01-05

Family

ID=13584148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7571375A Pending JPS52409A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Country Status (1)

Country Link
JP (1) JPS52409A (en)

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