When the pulse voltage is supplied to {HEAD ~ the electrodes} 40, 42 of {TAIL ~ the transducer elements} 36 through the printed circuit 48 and ground electrodes 46, the piezoelectric element 38 of each transducer element 36 is actuated to issue an ultrasonic wave 
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When the pulse voltage is supplied to { HEAD ~ the electrodes } 40 , 42 of { TAIL ~ the transducer elements } 36 through the printed circuit 48 and ground electrodes 46 , the piezoelectric element 38 of each transducer element 36 is actuated to issue an ultrasonic wave
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH