Phonation Model Based on Self-Exited Oscillation of Vocal Chords

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In phonation, the air from the lung is coupled with the motion of vocal cords to oscillate self-excitedly. This seif-excited oscillation provides sound sources. In this research, using a quasi-two dimensional flow channel, we performed a model experiment collect basic but refined data on steady and unsteady static preassures of separated and unseparated flows. Also, visualization on separated and reattached flows was made using a laser flow meter to trace many tiny polymer particles flowing with the fluid. secondly, using the experimental data mentioned above, we proposed an unsteady compressible and separable glottal flow theory. Finally using the proposed flow theory and a one-dimensional vocal cord-airway model, we performed a simulation analysis of voice production for heavy voice and falsetto.