JPS56141699A - Piezoelectric vibrator - Google Patents

Piezoelectric vibrator

Info

Publication number
JPS56141699A
JPS56141699A JP4430480A JP4430480A JPS56141699A JP S56141699 A JPS56141699 A JP S56141699A JP 4430480 A JP4430480 A JP 4430480A JP 4430480 A JP4430480 A JP 4430480A JP S56141699 A JPS56141699 A JP S56141699A
Authority
JP
Japan
Prior art keywords
acoustic
piezoelectric vibrator
piezoelectric
adopted
epoxy resin
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
JP4430480A
Other languages
Japanese (ja)
Inventor
Sadayuki Takahashi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4430480A priority Critical patent/JPS56141699A/en
Publication of JPS56141699A publication Critical patent/JPS56141699A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To easily obtain a characteristic which is excellent in directivity, by coating the acoustic radiation surface of a piezoelectric vibrator. CONSTITUTION:A piezoelectric plate (1.0mm. thick) of lead titanate is polarized in the direction of thickness. And, the respective different parts on the upper surface (acoustic radiation surface) are coated with 3 kinds of substances whose acoustic propagation losses are different. In the figure, 21, 22, 23 and 24 show lead titanate piezoelectric thickness oscillator, methyl pentane resin, epoxy resin and epoxy resin containing tungsten, respectively, and the acoustic propagation loss is larger in order of 22, 23 and 24. The graph shows a result which has been obtained by driving a piezoelectric vibrator this invention in the water and measuring an acoustic output along the direction as indicated with an arrow 25, and curves 31, 32 show that which has hot adopted this invention and that which has adopted this invention.
JP4430480A 1980-04-04 1980-04-04 Piezoelectric vibrator Pending JPS56141699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4430480A JPS56141699A (en) 1980-04-04 1980-04-04 Piezoelectric vibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4430480A JPS56141699A (en) 1980-04-04 1980-04-04 Piezoelectric vibrator

Publications (1)

Publication Number Publication Date
JPS56141699A true JPS56141699A (en) 1981-11-05

Family

ID=12687747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4430480A Pending JPS56141699A (en) 1980-04-04 1980-04-04 Piezoelectric vibrator

Country Status (1)

Country Link
JP (1) JPS56141699A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351989A (en) * 1976-10-21 1978-05-11 Furuno Electric Co Piezooelectric vibrator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351989A (en) * 1976-10-21 1978-05-11 Furuno Electric Co Piezooelectric vibrator

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