Abstract
General theoretic and applied studies on the effects of emotional and functional states on the acoustic parameters of human speech were analyzed. In most studies, the number of frequency, time, and power characteristics of vocalization were used as the most informative acoustic correlates of emotional and functional states. As a rule, sthenic states lead to the increase, and asthenic states induce the decrease in pitch, formant, and intensity. The relationship between acoustic parameters of speech and emotional and functional states was found, which depended on individual features of the subject and appeared as diverse changes in time and power parameters. For more accurate identification of psychoemotional state of an individual, the study of general tonal phonemes that are common and easily recognizable in different languages may be helpful. The research of acoustic correlates of individual speech parameters is a promising approach to diagnosis of functional and emotional states of a person using the vocalization parameters.
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