Chapter-1: Introduction to Ultrasonic Testing (UT) & Core Principles 1. What is Ultrasonic Testing? Welcome to this Ultrasonic Testing (UT) Level 2 Procedure Guide. Think of Ultrasonic Testing (UT) as an X-ray for industrial materials, but using sound instead of radiation. It’s a non-destructive testing (NDT) method where we send high-frequency sound waves usually between […]