Investigation of Acoustic Features for Emotional Speech using a Physiological Articulatory Model

In emotional speech studies, it is well known that loudness, pitch, position and length of pauses, etc. are important factors in expressing emotions. Besides those phonation features, the articulation of the vocal tract endows some spectral features that reflect emotions. Those features come from the special way of controlling articulatory organs in emotional states. Daily experiences tell us that some specific control strategies in articulation can result in certain emotional states. How-ever, the relation between the articulation and acoustic fea-tures is not clear yet. In this study, we investigate the spectral features using a physiological articulation model by manip-ulating the configurations of speech organs and synthesizing the corresponding speech sounds, in an analysis-by-synthesis way. The acoustic features concerned with emotional state