SOFTWARE. GeoNDT is a fast, physics-based, general-purpose computational tool mainly for advanced signal interpretation in geophysical laboratory non-destructive testing including the bender element (BE) and ultrasonic pulse velocity (UPV) tests, characterization of complex multiphase geomaterials, in-situ shallow seismic geophysics including the falling weight deflectometer (FWD) and multichannel analysis of surface waves (MASW) tests.