| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic wave transceiver with a comparatively narrow transmission and reception wave domain of at least one direction, and stable reverberation characteristics. SOLUTION: In this ultrasonic wave transceiver 10, when the thickness of a thick part is defined as t1, thickness of a thin part as t2, thickness of a side part arranged successively to the thin part is defined as A and x=t2/t1 and y=A/t2 are set, the transceiver 10 is formed so as to satisfy 0.50<=x<=0.64, 0.75<=y<=1.75, y<=-(50/7).x+163/28, y>=-(50/7).y+135/28.
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