Classification of acoustic emission signals in wood damage and fracture process based on empirical mode decomposition, discrete wavelet transform methods, and selected features

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 4 Comparison of classification results between unprocessed signals and processed signals

	Accuracy	Precision	Recall	F1-score
Unprocessed signals	0.748	0.740	0.748	0.728
EMD	0.779 (4.14%)	0.791 (6.89%)	0.779 (4.14%)	0.766 (5.22%)
DWT	0.847 (13.24%)	0.837 (13.11%)	0.847 (13.24%)	0.832 (14.29%)
EMD + DWT	0.946 (26.47%)	0.947 (27.97%)	0.946 (26.47%)	0.945 (29.81%)