Abstract

Dynamic Chaos and Fractals in Speech Rhythm

O.P.Skljarov (Speech Department, Research Institute of Ear, Throat, Nose & Speech, St.Petersburg, Russia)

e-mail: skljarov@admiral.ru

In the last decade the significant amount of tasks in physics and engineering were successfully resolved by methods of critical phenomenon theory. But it's yet rather surprisingly that this especially physical approach has appeared even more productive for explanation of many effects in such far from an engineering area as stuttering. In this paper we show the large-scale Voice/Unvoice temporal structure of normal and destroyed acoustic speech signal possesses the dynamical regimes set. On the base of Hausdorff dimensionalities of experimentally measured point set and its Kolmogorov entropy. we conclude that system has as regular fractal properties and irregular chaotic properties and system has critical point in scenario of its route to chaos. As it has appeared the change of these regimes was controlled by different external both instrumental and so-called learning influences on dynamical system. In our case this system is speech production mechanism of s! ome person, and these influences may be, for example, acoustic feedback, or, for example, the set of different governing, or so-called 'learning' procedures applied to this person. In particular these external influences are used to drive such temporal characteristics of stutters as speech temp and speech rhythm in area of its normal values.

Section : 8