Various investigative tools, including direct visualization with stroboscopy and indirect observation with glottography, have been widely used for the observation of vocal fold vibration.

许多观察带振动工具，包括影像观察喉频闪镜以及间接观察，均已被广泛地运用于带振动观察。

Methods Video-stroboscopy was used to reveal the laryngeal cavity and dynamic changes of the vocal fold, and sound spectrograph was used to examine audio frequency, pitch and width.

方法用频闪喉镜显示患者喉腔全貌和带动态变化，用分析检测并记录患者发频率、音调和音域。