Table 2.

The frequency range of sub-band coefficients at each scale.

Sub-band coefficients	Frequency ranges (Hz)
cd1	50–100
cd2	25–50
cd3	12.5–25
cd4	6.25–12.5
cd5	3.125–6.25
cd6	1.5625–3.125
cd7	0.78125–1.5625
cd8	0.390625–0.78125
ca8	0–0.390625