Fig. 8
Fine-scale amplitude and phase behaviour of the main frequency (left) and its harmonic (right) obtained by Period04. The harmonic does not show amplitude and phase variation. A 0ṃ015 amplitude decrease with a 0ṃ005 local increase are shown in the main periodicity. The straight increase in the phase of f0 is equivalent to the phase difference between the main frequency and its harmonic.
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