The anterior two third of glottis (phonatory portion), mucosa over the posterior commissure and the arytenoids muscle all remain intact.

此过程只影响杓状软骨内侧，然而声门前三分之二的发声区，后的膜及杓状肌皆持完好。

In order to study laryngeal phonic function,the methods of acoustic evaluation and phonatory detection has become the focused problem by doctors in otorhinolaryngology and speech pathology.

电子计算机试及频谱分析已成为客观检查的重要手段。其试参数为喉部疾病诊断、疗效评价的主要指标。