JPS57500494A - - Google Patents

Info

Publication number
JPS57500494A
JPS57500494A JP56501311A JP50131181A JPS57500494A JP S57500494 A JPS57500494 A JP S57500494A JP 56501311 A JP56501311 A JP 56501311A JP 50131181 A JP50131181 A JP 50131181A JP S57500494 A JPS57500494 A JP S57500494A
Authority
JP
Japan
Prior art keywords
layer
piezoelectric
covered
center
opening
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
JP56501311A
Other languages
Japanese (ja)
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 filed Critical
Publication of JPS57500494A publication Critical patent/JPS57500494A/ja
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
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

Device for generating acoustic signals using as an electromechanical transducer element a piezoelectric quadrangular ceramic plate (1) which is covered on the face opposite to the main layer (9) with a layer having on its center an opening (3) provided for the reactive coupling layer (4).
JP56501311A 1980-04-10 1981-04-10 Pending JPS57500494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3013788A DE3013788C2 (en) 1980-04-10 1980-04-10 Piezoceramic disc for a signal generator to generate an acoustic signal

Publications (1)

Publication Number Publication Date
JPS57500494A true JPS57500494A (en) 1982-03-18

Family

ID=6099671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56501311A Pending JPS57500494A (en) 1980-04-10 1981-04-10

Country Status (5)

Country Link
EP (1) EP0038043B1 (en)
JP (1) JPS57500494A (en)
AT (1) ATE7096T1 (en)
DE (1) DE3013788C2 (en)
WO (1) WO1981002963A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63314997A (en) * 1987-06-18 1988-12-22 Matsushita Electric Ind Co Ltd Piezo-electric sounding body
JP2007028469A (en) * 2005-07-21 2007-02-01 Nec Tokin Corp Acoustic vibration generating element, manufacturing method thereof, and acoustic vibration generating apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3230060C2 (en) * 1981-07-31 1986-07-31 Sumitomo Electric Industries, Ltd., Osaka Piezoelectric buzzer
US5881021A (en) * 1997-03-10 1999-03-09 Dreamco Enterprises Inc. Quick charge capacitor powered non-interruptible wearable personal security alarm
DE19902875C1 (en) * 1999-01-25 2000-07-20 Ideal Standard Piezoelectric sound transducer for stimulating bathtub wall to radiate sound has housing with thin-walled base that is liable to vibrate, carries piezoelectric element and faces bathtub wall
JP4203899B2 (en) * 2002-06-13 2009-01-07 オムロンヘルスケア株式会社 Electronic thermometer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635199A (en) * 1948-01-08 1953-04-14 John M Wolfskill Piezoelectric crystal apparatus
NL283763A (en) * 1961-09-29
US3495105A (en) * 1967-07-19 1970-02-10 Ngk Spark Plug Co Three-terminal piezoelectric resonator
US3578921A (en) * 1970-01-26 1971-05-18 Sonotone Corp Miniature multiple-diaphragm acoustic mechanoelectric transducer device
CA930211A (en) * 1970-08-20 1973-07-17 Johnson Matthey And Mallory Limited Piezoelectric transducer and noise making device utilizing same
GB1429856A (en) * 1973-03-07 1976-03-31 Taga Electric Co Ltd Transducers
US4122365A (en) * 1976-01-26 1978-10-24 Projects Unlimited, Inc. Piezoelectric buzzer device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63314997A (en) * 1987-06-18 1988-12-22 Matsushita Electric Ind Co Ltd Piezo-electric sounding body
JP2007028469A (en) * 2005-07-21 2007-02-01 Nec Tokin Corp Acoustic vibration generating element, manufacturing method thereof, and acoustic vibration generating apparatus

Also Published As

Publication number Publication date
WO1981002963A1 (en) 1981-10-15
DE3013788C2 (en) 1982-11-25
ATE7096T1 (en) 1984-04-15
EP0038043B1 (en) 1984-04-11
DE3013788A1 (en) 1981-10-15
EP0038043A1 (en) 1981-10-21

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