JPS51150321A - Electric echo converter - Google Patents

Electric echo converter

Info

Publication number
JPS51150321A
JPS51150321A JP7306275A JP7306275A JPS51150321A JP S51150321 A JPS51150321 A JP S51150321A JP 7306275 A JP7306275 A JP 7306275A JP 7306275 A JP7306275 A JP 7306275A JP S51150321 A JPS51150321 A JP S51150321A
Authority
JP
Japan
Prior art keywords
electric echo
converter
echo converter
electric
regarding
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
JP7306275A
Other languages
Japanese (ja)
Inventor
Yoshio Shiratori
Mizuhiro Hida
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7306275A priority Critical patent/JPS51150321A/en
Publication of JPS51150321A publication Critical patent/JPS51150321A/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
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer

Landscapes

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

Abstract

PURPOSE:Regarding both passage change and mass-production, electric echo converter having average frequency characteristics is supplied.
JP7306275A 1975-06-18 1975-06-18 Electric echo converter Pending JPS51150321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7306275A JPS51150321A (en) 1975-06-18 1975-06-18 Electric echo converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7306275A JPS51150321A (en) 1975-06-18 1975-06-18 Electric echo converter

Publications (1)

Publication Number Publication Date
JPS51150321A true JPS51150321A (en) 1976-12-23

Family

ID=13507476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7306275A Pending JPS51150321A (en) 1975-06-18 1975-06-18 Electric echo converter

Country Status (1)

Country Link
JP (1) JPS51150321A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54131836U (en) * 1979-03-22 1979-09-12
WO2011108441A1 (en) * 2010-03-01 2011-09-09 パナソニック電工株式会社 Piezoelectric speaker and alarm apparatus using this piezoelectric speaker

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4856128A (en) * 1971-11-11 1973-08-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4856128A (en) * 1971-11-11 1973-08-07

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54131836U (en) * 1979-03-22 1979-09-12
WO2011108441A1 (en) * 2010-03-01 2011-09-09 パナソニック電工株式会社 Piezoelectric speaker and alarm apparatus using this piezoelectric speaker
JP2011205613A (en) * 2010-03-01 2011-10-13 Panasonic Electric Works Co Ltd Piezoelectric speaker and alarm apparatus using the piezoelectric speaker

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