An ultrasound inspection training system comprising a test object (1), an ultrasound producing device (3) configured to generate ultrasonic signals in the test object and read ultrasonic response signals emitted from the test object, a property altering device (8) coupled to the test object, and a measurement computing system (5) having program modules (6) installed and executable therein, the program module (6) including a machine learning algorithm, wherein the property altering device is configured to alter the ultrasound propagation characteristics of the test object to generate ultrasonic response signal datasets for training a machine learning algorithm of a measurement computing system.