Effects of higher order propagation modes in vocal tract like geometries

Effects of higher order propagation modes in vocal tract like geometries

In this paper, a multimodal theory accounting for higher order acoustical propagation modes is presented as an extension to the classical plane wave theory. This theoretical development is validated against experiments on vocal tract replicas, obtained using a 3D printer and finite element simulatio...

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Veröffentlicht in:The Journal of the Acoustical Society of America 2015-02, Vol.137 (2), p.832-843
Hauptverfasser: Blandin, Rémi, Arnela, Marc, Laboissière, Rafael, Pelorson, Xavier, Guasch, Oriol, Van Hirtum, Annemie, Laval, Xavier
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Acoustics
Mechanics
Physics
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container_title The Journal of the Acoustical Society of America
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creator Blandin, Rémi
Arnela, Marc
Laboissière, Rafael
Pelorson, Xavier
Guasch, Oriol
Van Hirtum, Annemie
Laval, Xavier
description In this paper, a multimodal theory accounting for higher order acoustical propagation modes is presented as an extension to the classical plane wave theory. This theoretical development is validated against experiments on vocal tract replicas, obtained using a 3D printer and finite element simulations. Simplified vocal tract geometries of increasing complexity are used to investigate the influence of some geometrical parameters on the acoustical properties of the vocal tract. It is shown that the higher order modes can produce additional resonances and anti-resonances and can also strongly affect the radiated sound. These effects appear to be dependent on the eccentricity and the cross-sectional shape of the geometries. Finally, the comparison between the simulations and the experiments points out the importance of taking visco-thermal losses into account to increase the accuracy of the resonance bandwidths prediction.
doi_str_mv 10.1121/1.4906166
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subjects Acoustics
Mechanics
Physics
title Effects of higher order propagation modes in vocal tract like geometries
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