14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999


A Random-Walk Model of Jitter

Jean Schoentgen

Laboratory of Experimental Phonetics, Université Libre de Bruxelles, Brussels, Belgium; National Fund for Scientific Research, Belgium

The presentation concerns statistical models of jitter, the small stochastic perturbations of the glottal cycle lengths. Conventional models randomly update the cycle lengths in synchrony with glottal events. We propose instead to simulate jitter by means of stochastic difference equations. The equations we propose simulate several known properties of jitter via a set of minimal assumptions. The results agree with existing models that relate jitter to the neural input to the laryngeal muscles. The results also suggest that jitter depends on the parameters that control fundamental frequency and the synchrony of vocal fold movement.

Full Paper

Bibliographic reference.  Schoentgen, Jean (1999): "A random-walk model of jitter", In ICPhS-14, 2441-2444.