In a similar fashion to conventional ultrasonic testing equipment, acoustic wave tube screening inspection uses a pulser and receiver to send and receive acoustic signals. The pulser (a speaker) sends a series of short low frequency pulses down the inside diameter of a pipe or tube. The sonic wave travels along the inside of the pipe/tube, following it around bends and even complex spirals. The receiver detects any return signals that have been reflected by a blockage, cross section reduction or from sound exiting through a break in the pipe or a leak.
