angle beam

9.34  angle beam. Wave train traveling at an angle measured from the normal to the test surface to the centerline of the...

bubbler

9.33  bubbler. Device used to couple an ultrasonic beam to the test piece.

couplant

9.32  couplant. Substance used between the search unit and the test surface to permit or improve the transmission of acoustical...

collimator

9.31  collimator. Device used to control the size and direction of an ultrasonic beam.

dual search unit

9.30  dual search unit. Search unit containing two side-by-side elements with one serving as a transmitter and the other as a receiver.

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