作者: J.C. Somer
DOI: 10.1016/0041-624X(68)90277-1
关键词: Ultrasonic sensor 、 Acoustics 、 Repetition (rhetorical device) 、 Sound (medical instrument) 、 Medical diagnosis 、 Computer science
摘要: … sector scanning equipment especially for medical purposes. By means of a al-element array sound pulses can be transmitted in every direction within a sector … equal for all angles as in …