Ultraschallpruefvorrichtung

The echo signals from the far field (14) of a single testing head (11) are detectable in an ultrasonic testing device. The amplitudes and delays of the echo signals can be stored together with the position of the testing head (11) in a memory unit (22) in the form of local delay position curves. The echo signals can be filtered out from the totality of delay position curves in a filter device comprising preset filter functions, said filter device being formed by three filters in series (29, 33, 37), for example, in such a way that fault locations (2, 3, 4, 5, 6) in a unit under test (1) can be reconstructed in steps.