JPS52408A - Low noise underwater mike - Google Patents

Low noise underwater mike

Info

Publication number
JPS52408A
JPS52408A JP7571275A JP7571275A JPS52408A JP S52408 A JPS52408 A JP S52408A JP 7571275 A JP7571275 A JP 7571275A JP 7571275 A JP7571275 A JP 7571275A JP S52408 A JPS52408 A JP S52408A
Authority
JP
Japan
Prior art keywords
mike
low noise
underwater
noise underwater
noises
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
JP7571275A
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 JP7571275A priority Critical patent/JPS52408A/en
Publication of JPS52408A publication Critical patent/JPS52408A/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)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To eliminate noises and electric induction noises due to parallel movement of an underwater mike by forming hollow storage sections so that two piezoelectric elements disposed in the opposite direction of depolarization are probided with an equal drag.
JP7571275A 1975-06-23 1975-06-23 Low noise underwater mike Pending JPS52408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7571275A JPS52408A (en) 1975-06-23 1975-06-23 Low noise underwater mike

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7571275A JPS52408A (en) 1975-06-23 1975-06-23 Low noise underwater mike

Publications (1)

Publication Number Publication Date
JPS52408A true JPS52408A (en) 1977-01-05

Family

ID=13584116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7571275A Pending JPS52408A (en) 1975-06-23 1975-06-23 Low noise underwater mike

Country Status (1)

Country Link
JP (1) JPS52408A (en)

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