delayed sweep

9.39  delayed sweep. Horizontal sweep whose start is delayed in order to prevent the appearance of unwanted early response information on the...

delay line

9.38  delay line. Liquid or solid material placed in front of a projecting transducer to introduce a time delay to an ultrasonic wave...

focused beam

9.37  focused beam. Converging energy of a sound beam at a specified...

beam spread

9.36  beam spread. Divergence of the ultrasonic beam as a result of propagation through a medium.

beam axis

9.35  beam axis. Acoustic centerline of an ultrasonic search unit’s beam pattern as described by the locus of points of maximum sound pressure in the far field and its extensions into the near...

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