JPS5780899A - Transmitter and receiver - Google Patents

Transmitter and receiver

Info

Publication number
JPS5780899A
JPS5780899A JP15651780A JP15651780A JPS5780899A JP S5780899 A JPS5780899 A JP S5780899A JP 15651780 A JP15651780 A JP 15651780A JP 15651780 A JP15651780 A JP 15651780A JP S5780899 A JPS5780899 A JP S5780899A
Authority
JP
Japan
Prior art keywords
sheet
cylinder
acoustic impedance
piezoelectric sheet
molded
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.)
Granted
Application number
JP15651780A
Other languages
Japanese (ja)
Other versions
JPS632198B2 (en
Inventor
Haimi Takasaki
Yukio Saito
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 JP15651780A priority Critical patent/JPS5780899A/en
Publication of JPS5780899A publication Critical patent/JPS5780899A/en
Publication of JPS632198B2 publication Critical patent/JPS632198B2/ja
Granted 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 reduce the loss and make a device light-weight, by covering both end faces, at least, of the whole of the outside face of a piezoelectric sheet, which is formed into a cylinder, water-tightly with insulating materials having an acoustic impedance density approximating that of a used medium. CONSTITUTION:A piezoelectric sheet 1 which has electrodes 3 and 4 on both faces and is provided with an insulating material 2 on one electrode 4 is molded into a cylinder by rolling. This piezoelectric sheet 1 molded into a cylinder is covered with insulating materials 5, which have an acoustic impedance density approximating that of a used medium, watertightly without leaving air bubbles and air layers, thus forming a vibrator. By this watertight structure, the acoustic impedance density of the sheet 1 approximates that of water closely, and most of coming sounds is incident to the sheet 1. Further, by this structure, a transmitter and receiver is obtained which endures the external water pressure sufficiently and is light-weight and has less loss.
JP15651780A 1980-11-07 1980-11-07 Transmitter and receiver Granted JPS5780899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15651780A JPS5780899A (en) 1980-11-07 1980-11-07 Transmitter and receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15651780A JPS5780899A (en) 1980-11-07 1980-11-07 Transmitter and receiver

Publications (2)

Publication Number Publication Date
JPS5780899A true JPS5780899A (en) 1982-05-20
JPS632198B2 JPS632198B2 (en) 1988-01-18

Family

ID=15629505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15651780A Granted JPS5780899A (en) 1980-11-07 1980-11-07 Transmitter and receiver

Country Status (1)

Country Link
JP (1) JPS5780899A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542474A (en) * 1978-09-21 1980-03-25 Nec Corp Polymer piezoelectric vibrator and its manufacture

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542474A (en) * 1978-09-21 1980-03-25 Nec Corp Polymer piezoelectric vibrator and its manufacture

Also Published As

Publication number Publication date
JPS632198B2 (en) 1988-01-18

Similar Documents

Publication Publication Date Title
EP0355694A3 (en) Piezoelectric composite transducer for use in ultrasonic probe
JPS556995A (en) Method of and device for converting convergent ultrasonic wave
DE2960263D1 (en) Piezoelectric transducers with mechanical amplification for very low frequencies and acoustic antennas
AU5379579A (en) Surface acoustic wave pressure sensor structure
ATE1659T1 (en) ELECTROACOUSTIC TRANSDUCER WITH PIEZOELECTRIC LAYERED MEMBRANE.
DE3377888D1 (en) Electro-acoustic transducer with diaphragm
OA08763A (en) Electro-acoustic transducer.
JPS5780899A (en) Transmitter and receiver
FR2226910A5 (en) Motorway sound-insulating panel - several aligned screens adjacent motorway
DE3170225D1 (en) Improvements in electroacoustic transducers
JPS5530243A (en) Underwater sound transmitter-receiver
GB2096860B (en) Piezoelectric sound transducer
JPS5535558A (en) Sounding material
JPS5787700A (en) Transmitter and receiver
JPS5621498A (en) Wireless earphone unit
JPS55121799A (en) Electroacoustic conversion element
JPS54159215A (en) Speaker box
JPS5561193A (en) Ultrasonic wave transmission and reception unit array
JPS5725797A (en) Piezoelectric electroacoustic transducer
JPS52113717A (en) Electro-acoustic transducer
EP0132039A3 (en) Moisture resistant cover for an electroacoustic transducer
JPS5414722A (en) Acoustic diaphragm
JPS5750198A (en) Transceiver for underwater use
JPS6412407A (en) Piezoelectric cable for underwater use
JPS5530244A (en) Sound transmitter-receiver