Understanding Acoustic Emission Testing- Reading 1 Part B-A

■ Signal duration — This is the duration of a single acoustic emission event;
this too may be related to the type of damage mechanism.
■ Amplitude distribution — This provides the distribution of peak
amplitudes. This may assist in identifying the sources of the emission events
that are occurring.
■ Frequency analysis — This refers to the frequency spectrum of individual
acoustic emission events. This technique, generally requiring a fast Fourier
transformation analysis of the acoustic emission waves, may help
discriminate between different types of events. Unfortunately, a frequency
analysis may sometimes simply be a function of the response of the
transducer, and thus reveal little of the true nature of the pulse.
Charlie Chong/ Fion Zhang