Self-organizing jaw gestures with speech rate increase

Abstract This article examines how speech rate increase acts to articulatorily change the movements of the jaw gesture. The EMA and acoustic experiments with two subjects have corroborated some previous findings, as follows: a) acceleration duration decrease from slow to fast rate; b) peak/valley velocity (modulus) decrease from slow to fast rate; c) gestural duration decrease from slow to fast rate; and d) constant proportional time-to-peak/valley-velocity from slow to fast rate. The hypotheses of y-extremum decrease from slow to fast rate and constriction displacement decrease from slow to fast rate were not statistically significant, and, therefore, need further experiments.