Influence of cross section shape on the outcome of a two-mass model
Bo Wu, Annemie van Hirtum, Xiaoyu Luo · The Journal of the Acoustical Society of America · 2013
For the last decades, the two-mass model has shown its value to model the fluid-structure interaction during voiced speech production. Its main interest lies in its simplicity since it allows a quasi-analytical solution for a complex phenomenon using only a limited amount of physical meaningful parameters. Nevertheless, the use of the two mass model with respect to model speech pathologies can be questioned due to the lack of detail in the used mechanical and/or flow model. In the current paper, we focus on the influence of the cross section shape taken into account. Indeed, varying the cross section shape is likely to alter the pressure distribution due to viscous effects. The influence of the cross section shape on the flow outcome is modeled as well as experimentally assessed. Next, the influence of varying the cross section shape on phonation parameters such of the threshold pressure and fundamental frequency are addressed by considering a linear stability analysis of the two mass model.