title: Effects of higher order propagation modes in vocal tract like geometries.
abstract: 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.
authors.affiliation: GIPSA-Lab, Unité Mixte de Recherche au Centre National de la Recherche Scientifique 5216, Grenoble Campus, St Martin dHeres, F-38402, France.
authors.forename: Rémi
authors.initials: R
authors.lastname: Blandin
authors.affiliation: Grup de recerca en Tecnologies Mèdia, La Salle, Universitat Ramon Llull C/Quatre Camins 2, E-08022 Barcelona, Catalonia, Spain.
authors.forename: Marc
authors.initials: M
authors.lastname: Arnela
authors.affiliation: PACS Team, INSERM Unit 1028: Cognition and Brain Dynamics, Lyon Neurosciences Research Centre, EPU-ISTIL, Claude Bernard University, Boulevard du 11 Novembre 1918, 69622 Villeurbanne, France.
authors.forename: Rafael
authors.initials: R
authors.lastname: Laboissière
authors.affiliation: GIPSA-Lab, Unité Mixte de Recherche au Centre National de la Recherche Scientifique 5216, Grenoble Campus, St Martin dHeres, F-38402, France.
authors.forename: Xavier
authors.initials: X
authors.lastname: Pelorson
authors.affiliation: Grup de recerca en Tecnologies Mèdia, La Salle, Universitat Ramon Llull C/Quatre Camins 2, E-08022 Barcelona, Catalonia, Spain.
authors.forename: Oriol
authors.initials: O
authors.lastname: Guasch
authors.affiliation: GIPSA-Lab, Unité Mixte de Recherche au Centre National de la Recherche Scientifique 5216, Grenoble Campus, St Martin dHeres, F-38402, France.
authors.forename: Annemie
authors.initials: A
authors.lastname: Van Hirtum
authors.affiliation: GIPSA-Lab, Unité Mixte de Recherche au Centre National de la Recherche Scientifique 5216, Grenoble Campus, St Martin dHeres, F-38402, France.
authors.forename: Xavier
authors.initials: X
authors.lastname: Laval