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1st ETRW on Speech Production Modeling:
From Control Strategies to Acoustics
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1st ETRW on Speech Production Modeling:
From Control Strategies to Acoustics
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Production of plosive sounds is mainly due to the release of an occlusion in the vocal tract. Due to the shortness of this release, any physical model is made difficult in particular because details of the flow can significantly affect the generated sound. In this paper, we present a theoretical and experimental study of these effects using the typical example of bilabial plosives. The experimental part is based first on in-vivo measurements using a high speed video camera synchronously with pressure transducers. A second set-up was built in order to validate the theoretical models. It consists of an upscaled model of the vocal tract driven by unsteady flow conditions. Three theoretical models will be presented. The first one is based on an ideal description of the flow. The second one is based on a boundary layer theory to account for viscous effects, while the third one is based on the Jefferey-Hammel solutions. Application to plosive sounds and trills synthesis will be presented.
Bibliographic reference. Pelorson, Xavier / Jorno, David (1996): "Fluid mechanics of plosive sounds", In SPM-1996, 197-200.