Which signal processing method is commonly used in PAUT analysis?

In Phased Array Ultrasonic Testing (PAUT), time-of-flight calculation is a fundamental signal processing method used to determine the distance to a discontinuity or flaw within a material. This method relies on measuring the time it takes for an ultrasonic pulse to travel through the material, reflect off any discontinuities, and return to the transducer. By accurately calculating the time-of-flight, technicians can assess the depth and location of flaws with a high degree of precision.

This method is crucial in PAUT because it allows for the mapping of the internal structure of components being tested, which is essential for evaluating their integrity and ensuring safety. Understanding the time it takes for sound waves to travel through different materials enhances the analysis and aids in making informed decisions based on the data collected.

The other options, while related to various signal processing techniques, do not specifically pertain to the core signal processing methods used in PAUT analysis. Time-of-flight calculation is central to the accuracy and effectiveness of this testing method.