Materials that possess strong magnetic properties and can be magnetized, including iron, nickel, and cobalt.

The region in which the wavefront of an ultrasonic beam is well-formed and exhibits a stable beam pattern, typically located at a certain distance from the transducer or source.

The initial reflection of an ultrasonic wave from the front surface or entry point of a test object, often used as a reference point for measuring material thickness or detecting flaws.

The dimension of the length of an element in a linear phased array probe. Also called Passive Aperture.

The physical width or size of an individual element in an array transducer, which influences the beam width and lateral resolution.

The spacing or distance between adjacent elements in an array transducers, which determines the resolution and steering capabilities of the beam.

The physical length of an individual element used in array-based non-destructive testing techniques, which can affect the beam width and focusing capabilities.

Undesired and random electrical signals or disturbances present in electronic systems that can interfere with non-destructive testing signals and affect measurement accuracy.

The process of generating electric currents or voltages in a conductor by varying the magnetic field around it, commonly used in eddy current testing and electromagnetic testing methods.

The reflection of a wave from an interface or flaw back to the transducer in non-destructive testing, resulting in a received signal that represents the characteristics of the object.