According to the above method, it is possible to transmit the ultrasonic wave in such a manner that: the first combination of transmission elements is selected from among the multiple transmission elements so that {HEAD ~ the first combination} of transmission elements includes {TAIL ~ at least two transmission elements} adjacent to each other; and the transmission surfaces of the first combination of transmission elements vibrate in a substantially same phase so that the transmission surfaces of the first combination vibrate in an integral manner 
According to the above method , it is possible to transmit the ultrasonic wave in such a manner that : the first combination of transmission elements is selected from among the multiple transmission elements so that { HEAD ~ the first combination } of transmission elements includes { TAIL ~ at least two transmission elements } adjacent to each other ; and the transmission surfaces of the first combination of transmission elements vibrate in a substantially same phase so that the transmission surfaces of the first combination vibrate in an integral manner
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH