Apparatus for simulating inspection equipment, eg. ultrasonic NDT equipment or ultrasonic medical diagnostics equipment, comprises a test body (16), a simulated probe (18) for scanning over the body, a probe position monitor (20), inspection data storage (12, 14), a display (22) and a central processor (10) for correlating display of the inspection data with scanning movement of the probe (18). The inspection data is derived from non-simulated scanning of for example a structure containing defects and the ultrasonic waveforms obtained during such non-simulated scanning may be stored in memory (12, 14) for providing a realistic display during simulated scanning of the test body (16). The simulated probe (18) may incorporate an ultrasonic device for the purpose of sensing the degree of coupling between the simulated transducer and the test body (16) and the output of the device may be used to modify the inspection data to provide a displayed signal which is dependent on the coupling achieved by the operator.
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