High-speed kymography identifies the immediate effects of voiced vibration in healthy vocal folds

introduction: the effects of voiced vibration technique can be assessed by laryngeal imaging. kymographic images derived from high-speed videoendoscopy allow actual visualization of vocal folds vibration. purpose: the aim of this study is to identify the immediate effects of the voiced vibration technique in healthy vocal folds using high-speed digital laryngeal imaging. methods: samples were obtained from 15 healthy subjects with no history of voice disorders (6 men and 9 women aged 21 to 43 years). high-speed videoendoscopy recordings were performed before and after the voiced vibration technique. kymographic images were obtained using high-speed videoendoscopy. the vocal folds were examined in their open and closed positions and the characteristics of the opening and closing phases were determined. a customize computational routine was used quantify these parameters. the closing, opening, and speed quotients were also calculated. results: in this study, women displayed statistically significant differences in opened phase (p= 0.05*), closed phase (p= 0.046*), and closing phase (p= 0.026*) phase characteristics. men displayed the highest difference rate in opening time characteristics (p= 0.06). the closing and opening quotients for the female group showed significant differences (p= 0.029* and p= 0.049*, respectively). the speed quotient exhibited statistically significant differences in the male group (p= 0.048*). conclusion: the kymographic images indicated that the immediate effect of the voiced vibration technique was smooth contact in healthy vocal fold vibration.