In ultrasound testing, what does the term “sensitivity” refer to?

In ultrasound testing, "sensitivity" refers to the minimum flaw size that can be detected by the testing method. This concept is crucial because it directly impacts the effectiveness of the testing in identifying defects within a material. A higher sensitivity allows for the detection of smaller flaws, which is essential when evaluating components where minor defects could lead to significant issues, like in critical structural applications.

Sensitivity is determined by various factors, including the frequency of the ultrasonic waves used, the properties of the material being inspected, and the configuration of the testing equipment. Ensuring that the equipment is calibrated and that appropriate techniques are applied enhances the likelihood of identifying even the smallest anomalies within the tested material, thus allowing for more reliable quality assurance and safety assessments.