Flow through simplified vocal tract geometries

Annemie van Hirtum (1)

1 GIPSA-GAMA - GIPSA - Group aeroacoustics, modeling and application

Production of speech utterances such as fricatives involves a complex interaction of turbulent airflow with the particular geometry of the vocal tract. The current study introduces simplified mechanical rigid static vocal tract geometries consisting of a rectangular channel to which 1 or 2 constrictions are inserted allowing to study flow-obstacle and jet-obstacle interaction. Different constriction geometries and constriction degrees are considered. The flow through different geometries is predicted by simplified flow models and numerical simulation. Pressure and far-field noise are measured for typical geometrical configurations and different flow conditions. In addition, velocity measurements by means of hot-film anemometry are realized. Quantitative and qualitative comparison of modelled and measured values is assessed.

Mots clés: Vocal tract; Experimental validation; Flow model; Speech production

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

Annemie van Hirtum. Flow through simplified vocal tract geometries. CFA 2010 - 10ème Congrès Français d'Acoustique, Apr 2010, Lyon, France. pp.4. ⟨hal-00541379⟩