Sram F, Syka J
Acta Otolaryngol. 1977 Jul-Aug;84(1-2):132-7. doi: 10.3109/00016487709123951.
Electromyographic activity of the vocal muscle was analysed in 10 subjects during the phonation of different vowels and with different voice pitches. Analysis of the firing pattern of single or a few motor units was performed with the aid of an amplitude discriminator on the computer. The firing rate increases with increasing voice pitch (in the region co-ho the decrease of mean interspike interval with the slope 30-40 msec/octave was found). In the firing pattern of several motor units the periodicity was observed to be correlated with the voice pitch. The period of 8 msec corresponding H, 123 Hz, decreased to about 6 msec during phonation of do, 147 Hz. The periodicity was present both in units with pure prephonatory activity and in units which were active during phonation. It seems possible that the activity in the vocal muscle changes characteristically during the phonation of different vowels.
在10名受试者发出不同元音且音高不同时，对其发声肌肉的肌电图活动进行了分析。借助计算机上的幅度鉴别器对单个或少数运动单位的放电模式进行了分析。放电率随音高增加而增加（在该区域发现平均峰间间隔以30 - 40毫秒/倍频程的斜率下降）。在几个运动单位的放电模式中，观察到周期性与音高相关。对应于H（123赫兹）的8毫秒周期，在发出do（147赫兹）时减少到约6毫秒。这种周期性在纯发声前活动的单位以及发声期间活跃的单位中均存在。在发出不同元音时，发声肌肉的活动似乎有可能发生特征性变化。
