Reflecting And Absorbent Surface. Sound Wave

KEYWORDS

acoustic acoustics aiming antenna communication cross danger detect detection determine diagram digital direction distance echo echosounder education emits emitting environment equipment hydroacoustics infrasonic instead interval listening location medical navigation operation physics principle pulse pulses radar radio ranging ray receiver reflected reflection returns safety satellite scan schematic scheme science section signal sonar sound soundwave strike structure target technology transmitter ultrasonic ultrasonography ultrasound underwater vector vibration water wave waves