声帯粘膜波状運動に関する実験的研究

在气流增加和声带纵向张力两种情况下，同时记录声带的垂直和水平运动。使用四只犬切除喉部。声带在垂直方向上的振动速度和振幅在膜质声带中部达到最大。在一定张力下，垂直速度和振幅随气流的增大而增大。声带的延长导致四个喉头中的三个喉头垂直速度和振幅的下降。另一组表现出垂直速度和振幅的增加，随着声带张力的进一步增加而下降。声带的延长总是引起基频（F_0）的增加。声带在振动的闭合阶段向上移动。向上流速在开启初期达到最大值，随后逐渐减小。在开启阶段中期，垂直速度下降。声门最大时，声带向下移动。向下的速度在关闭阶段的中间达到最大。在结束期后期，垂直运动再次转为上升。然后，向上的速度增加，接着是声门关闭。气流的增加导致F_0的增加。然而，在声带延长和未延长的情况下，给定喉部垂直速度与F_0的关系是不同的。

Vertical and horizontal movements of the vocal fold was simultaneouly recorded under two conditions : increase in airflow and longitudinal tension of the vocal fold. Four canine excised larynges were used.Velocity and amplitude of vocal fold vibration in the vertical direction became maximal at the mid portion of the membranous vocal fold. Under a given tension, vertical velocity and amplitude increased as airflow was increased. Lengthening of the vocal fold resulted in a decrease in vertical velocity and amplitude in three of the four larynges. The other showed an increase in vertical velocity and amplitude, which decreased as the vocal fold tension was increased further. Lengthening of the vocal fold invariably caaused an increase in fundamental frequency (F_0).The vocal fold moved up during a closed phase of a vibration. An upward velocity showed a maximum at the initial period of the opening phase and decreased subsequently. At the middle of the opening phase, the vertical velocity turned downward. The vocal fold moved downward when the glottis was maximal. The downward velocity became maximal at the middle of the closing phase. The vertical movement again became upward at the later period of the closing phase. Then, the upward velocity increrased, followed by the closure of the glottis.An increase in airflow resulted in an increase in F_0. However, the relations of the vertical velocity with F_0 in the given larynx were different between the conditions with and without lengthening of the vocal fold.