SPH simulations of aeroacoustic problems in vocal tracts

WEI Jianguo; HAN Jiang; HOU Qingzhi; WANG Song; DANG Jianwu

doi:10.16511/j.cnki.qhdxxb.2016.26.019

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Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (11) : 1242-1248. DOI: 10.16511/j.cnki.qhdxxb.2016.26.019

COMPUTER SCIENCE AND TECHNOLOGY

SPH simulations of aeroacoustic problems in vocal tracts

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Abstract

Simulation of human sound wave propagation need to take into account the moving boundaries and fluid flow within the vocal tract for accurate realistic models. Traditional mesh-based methods that are widely used to study human sound production have many problems due to mesh reconstruction and distortion, so they are not as effective as meshless methods. The aeroacoustic wave equations in the Eulerian framework are transformed to the governing equations for wave propagation in the Lagrangian form and discretized using the smoothed particle hydrodynamics (SPH) method. The accuracy and reliability of SPH for wave propagation in a static media are shown by comparisons with finite difference time domain (FDTD) results. This method is validated against the Doppler effect based theoretical solutions for one-and two-dimensional aeroacoustics to verify the ability of SPH to solve complex aeroacoustic problems.

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aeroacoustics / vocal tract / meshless / smoothed particle hydrodynamics / Lagrangian method

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WEI Jianguo, HAN Jiang, HOU Qingzhi, WANG Song, DANG Jianwu. SPH simulations of aeroacoustic problems in vocal tracts[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(11): 1242-1248 https://doi.org/10.16511/j.cnki.qhdxxb.2016.26.019

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