EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology

Aalborg, Denmark
September 3-7, 2001


A Quasi-One-Dimensional Model of Aerodynamic and Acoustic Flow in the Time-Varying Vocal Tract: Source and Excitation Mechanisms

Gordon Ramsay

Universite Libre de Bruxelles, Belgium

In this paper, the conservation laws of classical fluid mechanics are used to derive a quasi-one-dimensional model of fluid flow in an elastic tube of time-varying cross-sectional area, representing the human vocal tract. The global flow equations are then decomposed into aerodynamic and acoustic components, representing respiratory flow and sound propagation during speech. The nature of the coupling between the two systems is investigated, and a new interpretation of the traditional source-filter model of speech production is proposed.

Full Paper

Bibliographic reference.  Ramsay, Gordon (2001): "A quasi-one-dimensional model of aerodynamic and acoustic flow in the time-varying vocal tract: source and excitation mechanisms", In EUROSPEECH-2001, 43-46.