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• W3093286717 abstract "Abstract A link is established between biomechanical and acoustic 3D models for the numerical simulation of vowel‐vowel utterances. The former rely on the activation and contraction of relevant muscles for voice production, which displace and distort speech organs. However, biomechanical models do not provide a closed computational domain of the 3D vocal tract airway where to simulate sound wave propagation. An algorithm is thus proposed to extract the vocal tract boundary from the surrounding anatomical structures at each time step of the transition between vowels. The resulting 3D geometries are fed into a 3D finite element acoustic model that solves the mixed wave equation for the acoustic pressure and particle velocity. An arbitrary Lagrangian–Eulerian framework is considered to account for the evolving vocal tract. Examples include six static vowels and three dynamic vowel‐vowel utterances. Plausible muscle activation patterns are first determined for the static vowel sounds following an inverse method. Dynamic utterances are then generated by linearly interpolating the muscle activation of the static vowels. Results exhibit nonlinear trajectory of the vocal tract geometry, similar to that observed in electromagnetic midsagittal articulography. Clear differences are appreciated when comparing the generated sound with that obtained from direct linear interpolation of the vocal tract geometry. That is, interpolation between the starting and ending vocal tract geometries of an utterance, without resorting to any biomechanical model." @default.
• W3093286717 created "2020-10-22" @default.
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• W3093286717 date "2020-10-29" @default.
• W3093286717 modified "2023-10-18" @default.
• W3093286717 title "Simulation of vowel‐vowel utterances using a<scp>3D</scp>biomechanical‐acoustic model" @default.
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• W3093286717 doi "https://doi.org/10.1002/cnm.3407" @default.
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