Acoustic source term interpolation in a hybrid aeroacoustic simulation of the human phonation

Voice research is carried out experimentally by applying physical replicas and numerical models. Experimental investigations involve high personnel, material and thus financial costs. Furthermore, the scientific outcome is limited to the few parameters that are measured at specific positions in the larynx replica. In contrast to that, numerical models provide a much higher amount of results since parameters from all possible locations in the model can be obtained and analyzed. We follow a hybrid aeroacoustic approach, which performs in a first step an incompressible flow simulation on a computational grid which is capable of resolving all relevant turbulent scales. In a second step, we compute the acoustic source terms on the flow grid and perform a conservative interpolation to the acoustic grid on which we solve the perturbed convective wave equation to obtain the acoustic field. Finally, we validate the simulation results with results obtained from measurements.