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