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

Author(s)

Regina Aparecida Pimenta ^[1] ; María Eugenia Dájer ^[2] ; Adriana Hachiya ^[3] ; Gislaine Ferro Cordeiro ^[4] ; Domingos Hiroshi Tsuji ^[5] ; Arlindo Neto Montagnoli ^[6]

Affiliation

^[1] University of São Paulo

^[2] University of São Paulo. School of Medicine. Department of Otolaryngology

^[3] University of São Paulo. School of Medicine. Department of Otolaryngology

^[4] University of São Paulo. School of Medicine. Department of Otolaryngology

^[5] University of São Paulo. School of Medicine. Department of Otolaryngology

^[6] University Federal of São Carlos. Department of Electric Engineering

• Document type: Journal article
• Source: Int. Arch. Otorhinolaryngol.; v. 17, n. 1, p. 74-79, 2013-03-00.

Abstract

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. (AU)

• FAPESP's process: 10/03345-0 - Evaluation of vocal exercise effects in normal voices with perceptual and acoustic analysis and comparison with high-speed videolaryngoscopy images
• Grantee: Regina Aparecida Pimenta
• Support Opportunities: Scholarships in Brazil - Master