Second European Conference on Speech Communication and Technology

Genova, Italy
September 24-26, 1991


Evidence of Chaos in Phonatory Samples

H. Herzel, J. Wendler

Humboldt-University of Berlin, Germany

Acoustic waveforms from pathological voices are analyzed by methods from nonlinear dynamics. It is emphasized that many observations of rough and creaky voices, of frequency jumps, and diplophonia can be interpreted as manifestations of low-dimensional dynamics in an appropriate phase space. Attractors are characterized by means of Poincare sections, fractal dimensions and Lyapunov exponents. Keywords: voice pathologies, deterministic chaos, phase space, attractor, bifurcation

Full Paper

Bibliographic reference.  Herzel, H. / Wendler, J. (1991): "Evidence of chaos in phonatory samples", In EUROSPEECH-1991, 263-266.