Figure 5From: Distinguishing low frequency oscillations within the 1/f spectral behaviour of electromagnetic brain signalsTime domain spectral normalisation by ARMA modelling. (a) Spectral normalisation achieved by the input FIR filter, (b) The corresponding spectrograms of the original EEG signal (amplitude in log scale) and of the filtered signal (amplitude in linear scale) showing a dominant peak at 0.1 Hz.Back to article page