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Fluid dynamical issues in vocal-fold toy models| old_uid | 14456 |
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| title | Fluid dynamical issues in vocal-fold toy models |
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| start_date | 2014/10/10 |
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| schedule | 13h30 |
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| online | no |
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| location_info | salle Mont Blanc |
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| summary | Simple dynamical models can be particularly useful to isolate the different sources of complexity of a phenomenon. Reductions help gain insight into multi-physics problems, allowing for the identification (and analysis) of the different mechanisms in play. In the past, this approach was used for instance to analyze feedback effects on vocal fold motion, or source-source coupling in birdsong. This work uses toy-models to address some issues that have plagued voice science for a number of years. These concern the nature of the glottal jet, both within the glottis and in the postglottal region. A first model focuses on the space-time distribution of particle velocity and pressure along the glottal length. A second model deals with the problem that a flow solution requires a finite distance for the flow and acoustics to reach one-dimensionality, with commonly-employed acoustic solvers that assume that one-dimensionality occurs instantly at the glottis. Toy-models are derived and employed to tackle these two questions, comparing the model behavior with the standard modeling approach. |
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| responsibles | Hueber |
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