Blandin Rémi, Arnela Marc, Laboissière Rafael, Pelorson Xavier, Guasch Oriol, Van Hirtum Annemie, Laval Xavier
GIPSA-Lab, Unité Mixte de Recherche au Centre National de la Recherche Scientifique 5216, Grenoble Campus, St Martin dHeres, F-38402, France.
Grup de recerca en Tecnologies Mèdia, La Salle, Universitat Ramon Llull C/Quatre Camins 2, E-08022 Barcelona, Catalonia, Spain.
J Acoust Soc Am. 2015 Feb;137(2):832-43. doi: 10.1121/1.4906166.
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.
本文提出了一种多模态理论，作为经典平面波理论的扩展，用于解释高阶声学传播模式。该理论发展通过对使用3D打印机制作的声道模型进行实验以及有限元模拟得到验证。使用复杂度不断增加的简化声道几何形状来研究一些几何参数对声道声学特性的影响。结果表明，高阶模式会产生额外的共振和反共振，并且还会强烈影响辐射声。这些效应似乎取决于几何形状的偏心率和横截面形状。最后，模拟与实验之间的比较指出了考虑粘热损耗对于提高共振带宽预测准确性的重要性。
