wave train

9.54  wave train. Succession of ultrasonic waves arising from the same source, having the same characteristics and propagating along the same...

immersion testing

9.53  immersion testing. In ultrasonic testing, an inspection method where the search unit and the material are submerged in a...

loss of back reflection

9.52  loss of back reflection. In ultrasonic testing, absence of or significant reduction of an ultrasonic signal from the back surface of the object under...

reflector

9.51  reflector. Interface at which an ultrasonic beam encounters a change in acoustic impedance and at which at least part of the acoustic energy is...

amplitude

9.50  amplitude. In ultrasonic testing, the vertical pulse height of a signal, usually base to peak, when indicated by an A-scan...

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