6Jing Lin.Feature extraction of machine sound using wavelet and its application in fault diagnosis. NDT and E International . 2001
7Yan RQ,Gao RX.Multi-scale enveloping spectrogram for vibration analysis in bearing defect diagnosis. Tribology International . 2009
8Yuh-Tay Sheen.On the study of applying Morlet wavelet to the Hilbert transform for the envelope detection of bearing vibrations. Journal of Mechanical Systems . 2009
9Z Li,S.Akishita.Engine Failure diagnosis with sound signal using the wavelet transform. SAE paper 970034 . 1997
10JianDa Wu,JienChen Chen.Continuous wavelet transform technique for fault signal diagnosis of internal combustion engines. NDT and E International . 2006