What might be a consequence of high-frequency electromagnetic fields during testing?

High-frequency electromagnetic fields can cause unpredictable signal patterns and disruptions in Eddy Current Testing. At elevated frequencies, the response of the material being tested can become more complex due to factors such as skin effect, which causes eddy currents to flow only on the surface of conductive materials. This can lead to variations in the amplitude and phase of the signals being obtained.

The interaction of high-frequency fields with the material's microstructure may introduce noise, which complicates the interpretation of the results. This unpredictability can make it difficult for technicians to discern actual defects from noise, thus potentially misleading the testing process.

In practical scenarios, these effects can manifest as reduced clarity in the signals, making it harder to identify and locate defects accurately. It's essential for professionals in the field to carefully consider the frequency being used in Eddy Current Testing to avoid such complications.