According to the above method, since {TAIL ~ a large number} of {HEAD ~ transmission elements} is not required, it is possible to downsize an ultrasonic sensor 
According to the above method , since { TAIL ~ a large number } of { HEAD ~ transmission elements } is not required , it is possible to downsize an ultrasonic sensor
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH