Phonation Model Based on Self-Exited Oscillation of Vocal Chords

在发声时，来自肺部的空气与声带的运动相耦合，以自激振荡。这种自激振荡提供了声源。在本研究中，我们利用准二元流道进行了一个模型实验，收集了分离流和未分离流的定常和非定常静态压力的基本但精确的数据。此外，分离和再附着流的可视化，使用激光流量计跟踪许多微小的聚合物颗粒与流体流动。其次，利用上述实验数据，提出了一个非定常可压缩可分离声门流理论。最后，利用所提出的流理论和一个一维的声带-气道模型，我们进行了模拟分析的发声沉重的声音和假声。

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.