November 1, 2018 at 5:30 pm

Math-Biology Seminar | Wow: Delay-Induced Oscillations of Voice and Speech, Nov. 27

The Dynamical Systems and Mathematical Biology Seminar series presents Francois-Xavier Brajot on “Wow: Delay-induced oscillations of voice and speech” on Tuesday, Nov. 27, from 4 to 5 p.m. at Morton 127.

Brajot is Assistant Professor of Communication Studies and Disorders at Ohio University.

Abstract: Corrections in on-going speech production for changes in sensory feedback suggest that sensorimotor loops act as negative feedback systems. An important property of negative feedback systems is that they tend to oscillate when delay is introduced into the system. By simply delaying auditory feedback during vocal tasks, I show that this is indeed the case: delay introduces slow oscillations of pitch and intensity known in the field as “wow”.  Current work is focused on modeling the possible mechanisms involved in generating this response and on determining whether wow alters the natural coordination between speech subsystems in certain neurological disorders.

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