With an ultrasonic transducer 30 constructed as described above, the drive circuit impresses {TAIL ~ the pulse voltage} {HEAD ~ whose phase} has been controlled to a prescribed level upon the printed circuit terminals 50 
With an ultrasonic transducer 30 constructed as described above , the drive circuit impresses { TAIL ~ the pulse voltage } { HEAD ~ whose phase } has been controlled to a prescribed level upon the printed circuit terminals 50
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH