PhD: Theoretical and experimental investigation of aero-acoustics in time-varying deformable waveguides: application to speech sound production

Within the context of human speech productions, waveguide acoustics is well studied for steady geometries and in absence of flow. Nevertheless, human speech sound production involves articulation and respiratory airflow, which are omitted from most studies dealing with the physics of speech production. As such, the originality of the proposed PhD is two-fold in addressing firstly the influence of time-varying waveguide properties (area, cross-section shapes, elasticity) on acoustic wave propagation and secondly in accounting for wave propagation and generation in presence of airflow. This last aspect implies to address the influence of waveguide dynamics on the generation and interaction of different sound sources – e.g., due to a fluid-structure interaction for voiced sounds or of aero-acoustic nature for fricatives – as well as the influence of waveguide’s wall properties on sound propagation and interaction.