JPS52410A - High sensitivity, low noise underwater mike - Google Patents

High sensitivity, low noise underwater mike

Info

Publication number
JPS52410A
JPS52410A JP7571475A JP7571475A JPS52410A JP S52410 A JPS52410 A JP S52410A JP 7571475 A JP7571475 A JP 7571475A JP 7571475 A JP7571475 A JP 7571475A JP S52410 A JPS52410 A JP S52410A
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
JP7571475A
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 JP7571475A priority Critical patent/JPS52410A/en
Publication of JPS52410A publication Critical patent/JPS52410A/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/02—Microphones

Abstract

PURPOSE:To reduce noise and enhance sensitivity of an underwater mike by equalizing static pressures applied to a liquid inside the mike and to an txternal medium to offset a drag acting on each of two sets of parallel-system bimorph piezoelectric ele ments.
JP7571475A 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike Pending JPS52410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7571475A JPS52410A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7571475A JPS52410A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Publications (1)

Publication Number Publication Date
JPS52410A true JPS52410A (en) 1977-01-05

Family

ID=13584179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7571475A Pending JPS52410A (en) 1975-06-23 1975-06-23 High sensitivity, low noise underwater mike

Country Status (1)

Country Link
JP (1) JPS52410A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249958A (en) * 1984-05-24 1985-12-10 セノ−株式会社 Massage machine
JPS6215335U (en) * 1985-07-12 1987-01-29
JPS63154174A (en) * 1986-12-18 1988-06-27 片田　豊三 Vertebra correcting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249958A (en) * 1984-05-24 1985-12-10 セノ−株式会社 Massage machine
JPS6215335U (en) * 1985-07-12 1987-01-29
JPH0228906Y2 (en) * 1985-07-12 1990-08-02
JPS63154174A (en) * 1986-12-18 1988-06-27 片田　豊三 Vertebra correcting apparatus

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