Understanding Acoustic Emission Testing- Reading 1 Part B-A

AET Limitations
On the negative side;
• AET requires stimulus. (process stimulus or externally test stimulus?)
• AE technique can only (1) qualitatively estimate the damage and predict (2)
how long the components will last. So,
• other NDT methods are still needed for thorough examinations and for
obtaining quantitative information.
• Plant environments are usually very noisy and the AE signals are usually
very weak. This situation calls for incorporation of signal discrimination and
noise reduction methods. In this regard, (1) signal processing and (2)
frequency domain analysis are expected to improve the situation.
Charlie Chong/ Fion Zhang
http://www.geocities.ws/raobpc/AET.html