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