Finally, note that in all cases of the process-type identification (accumulation of dispersed micro-damages, growth of main cracks, leak) by the cumulative attributes (AE signal
amplitude mode; entropy of amplitude probability distribution), no preliminary filtration of data has been carried out.
Further, the observed waves in rod generally agree with the calculated dispersion curve, except for the trailing part of the L(0.1)-component However, it appears difficult to understand which parts of the waves have propagating modes and to predict high
amplitude modes. This is especially true in the thick-rod behavior.