Table 1.

The frequency characteristics of the constructed wavelet filter bank.

Set of coefficients	s0[n]	s1[n]	s2[n]	s3[n]	s4[n]	s5[n]
Approximate frequency band(Hz)	0–0.15	0.07–0.15	0.04–0.07	0.02–0.04	0.01–0.02	0–0.01
Approximate time-scale (s)	>7	7–14	14–27	27–54	50–109	>109

The original time-series is denoted by s⁰[n].