Affective Computing is a field of research that "relates to, arises from, or deliberately influences emotion or other affective phenomena" (Picard, MIT Press 1997).
Speech signal is a nonstationary signal that is generated by a complex phenomenon that is influenced by the autonomic and somatic nervous systems, through the modulation of breathing activity, vocal muscles tension, salivation and mucus secretion. Generally, phonatory system can be modelled according to the so-called source-filter theory of speech production. In this model the source is represented by pulsatile airflow or turbulent airflow generated by the modulating action of the vocal folds.
Computational Physiology & Biomedical Instruments Group, University of Pisa
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