813281.fig.006a
(a)
813281.fig.006b
(b)
813281.fig.006c
(c)
813281.fig.006d
(d)
813281.fig.006e
(e)
813281.fig.006f
(f)
Figure 6: Comparison of experimental signals for defective and defect-free pipes using different wavelet functions with a scale of 64 for (a) db4, (b) sym4, (c) coif2, (d) gauss1, (e) Meyer, and (f) Mexican hat wavelet functions.