The authors used long-time averaged spectrum and three-dimensional analysis of periodicity (3D-PAN) for analyzing emotional expressions in utterances. They confirmed the movement of the skewness of formant region, that is getting smaller at anger and at joy. It can reach positive values. The skewness is higher at sadness. These findings correspond to the physiological phenomena that we can follow in the whole musculature. The 3D-PAN has not brought any new finding as far.