PIEZOELECTRIC TRANSDUCER

To provide a piezoelectric transducer which has improved transmission/reception sensitivity.SOLUTION: In an ultrasonic transducer 1, vibration of a piezoelectric vibration unit 18 is less likely to reach a case 12 because it is damped to a certain degree in an acoustic matching layer 30. As a result...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMURA YU, IJIRI HIROYUKI, TAKEDA AKITAKE, AZUMA TOMOHISA, HONMA MITSUHISA, OTA YOSHIO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	To provide a piezoelectric transducer which has improved transmission/reception sensitivity.SOLUTION: In an ultrasonic transducer 1, vibration of a piezoelectric vibration unit 18 is less likely to reach a case 12 because it is damped to a certain degree in an acoustic matching layer 30. As a result, the ultrasonic transducer 1 can improve its transmission/reception sensitivity.SELECTED DRAWING: Figure 2 【課題】送受信感度の向上が図られた圧電トランスデューサを提供する。【解決手段】超音波トランスデューサ１においては、圧電振動ユニット１８の振動は、音響整合層３０においてある程度減衰されるため、ケース１２まで到達しにくくなっている。それにより、超音波トランスデューサ１では送受信感度の向上を図ることができる。【選択図】図２