{TAIL ~ The transducer elements} are impressed with voltage through {HEAD ~ the printed circuit} and ground electrode to issue ultrasonic waves 
{ TAIL ~ The transducer elements } are impressed with voltage through { HEAD ~ the printed circuit } and ground electrode to issue ultrasonic waves
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH