Which factor does NOT affect the sensitivity of an Eddy current test?

The sensitivity of an Eddy current test is influenced by several factors that relate directly to the interaction between the electromagnetic field generated by the coil and the material being inspected. The quality of the testing environment, while important for the overall quality of the testing process, does not have a direct impact on the sensitivity of the Eddy current method itself.

The coil design is critical because it determines how effectively the electromagnetic field interacts with the test material. Different designs can optimize the detection of flaws based on their size and location.

The type of material being tested plays a significant role as well, since different conductive materials will respond differently to the Eddy currents based on their conductivity, permeability, and other physical properties.

Frequency of the current directly affects the depth of the Eddy currents and the resolution of the detection capability, meaning changes in frequency can enhance or reduce sensitivity.

While a poor testing environment could lead to inaccuracies or noise in measurements, it does not inherently change the fundamental sensitivity of the Eddy current testing method to detect flaws. Thus, the aspects that truly impact sensitivity relate to the direct interactions caused by coil design, material properties, and current frequency.