Phonation Model Based on Self-Exited Oscillation of Vocal Chords

发声时，来自肺部的空气与声带的运动相结合，以自激方式振荡。这种自激振荡提供了声源。在这项研究中，我们利用一个准二维流道进行了模型实验，收集了分离和不分离流动的定常和非定常静压的基本但精细的数据。此外，使用激光流量计对分离和重新附着的流动进行了可视化，以跟踪许多随流体流动的微小聚合物颗粒。其次，利用上述实验数据，提出了声门非定常可压缩可分离流动理论。最后，利用提出的流动理论和一维声带-呼吸道模型，对重声和假声的发声过程进行了仿真分析。

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.