METHODS: The stroboscopic images were digitized by an image grabber and recorded with an SMPTE time code generated by a time code generator.

• 方法：我们以时码产生器产生SMPTE时码，将其输入喉频闪镜影像录影带之声道中，并将时码讯号与声门图仪讯号同时数位化。