Effects of mental stressors during flight on prosodic features of speech and autonomic nervous responses—Estimation of psychological stress by voice analysis—

Abstract

This study examined the relationship between vocal and physiological indices of pilots subjected to mental stressors during flight to determine the optimum voice indices for estimating psychological stress by using structural equation modeling. The results of modeling demonstrate that the variables of voice index, average fundamental frequency, and absolute jitter, as well as variables of physiological index, including pupil diameter and average heart rate, are strong measures to assess fit of the model.