What is a characteristic of high-frequency waves in Ultrasonic Testing?

High-frequency waves in Ultrasonic Testing (UT) are characterized by their ability to provide higher resolution for detecting small defects. This is due to the shorter wavelength associated with higher frequency. Shorter wavelengths allow for more precise imaging and can distinguish between closely spaced discontinuities, making the detection of small flaws such as micro-cracks or inclusions more effective.

While high-frequency waves have certain limitations in terms of penetration depth, focusing primarily on resolution is crucial in applications where identifying minor defects is essential. The other characteristics mentioned, such as producing louder sounds or being less sensitive to defects, do not accurately represent the benefits of high-frequency waves in UT, as their usefulness is primarily in achieving detailed examination of materials rather than in sound intensity or defect sensitivity.