Acoustic emission (AE) is a non-destructive testing (NDT) method that uses sensors to detect and locate sound waves that are produced by the sudden release of energy in a material. This can be caused by a variety of factors, including cracks, corrosion, or other defects in the material.

AE testing is typically used to detect and diagnose problems in structures, such as bridges, pipelines, and pressure vessels. It is a valuable tool for identifying defects and potential failure points in materials, and it is often used as part of a comprehensive NDT program.

AE testing is a fast and efficient method of inspection, and it allows for the detection of defects that may not be visible with other NDT methods.