A technique used in ultrasonic testingA non-destructive testing (NDT) method that uses high-frequency sound waves to detect and evaluate internal flaws, discontinuities, or material properties in va… (UTSystems used in non-destructive testing that utilize sound waves to detect, identify, and measure anomalies within a pipeline integrity test or management progr…) to inspect materials for defects or abnormalities. It involves the use of two separate ultrasonic transducers: one transducerA device for converting energy from one form to another. In ultrasonic testing, conversion of electrical pulses to acoustic waves and vice versa. emits the ultrasoundRefers to sound waves with frequencies above the upper limit of human hearing, typically above 20,000 Hz. Ultrasound is used to determine wall thickness and to … (pitch) and the other transducer receives the reflected ultrasound (catch).