| 摘要 |
An ultrasonic transducer element comprises a columnar giant magnetostrictive rod (12) composed of a giant magnetostrictive member, and diaphragms (14, 16) which are tightly fixed to axial end faces of the giant magnetostrictive rod (12) and respectively composed of a plate member having a larger diameter than the giant magnetostrictive rod (12). Although the ultrasonic transducer element is small and has a simple structure, it efficiently transmits ultrasonic vibrations produced by expansion and contraction of the magnetostrictive rod.
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