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Int Arch Otorhinolaryngol 2013; 17(01): 074-079
DOI: 10.7162/S1809-97772013000100013
Original Article
Thieme Publicações Ltda Rio de Janeiro, Brazil

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

Regina Aparecida Pimenta
1   Master in Bio-Engineering. Doctorate. Post Graduation in Bio-Engineering - University of São Paulo - São Carlos.
,
María Eugenia Dájer
2   Doctor in Sciences. Post-Doctorate. Department of Otolaryngology, School of Medicine, University of São Paulo.
,
Adriana Hachiya
3   Doctor in Sciences. Department of Otolaryngology, School of Medicine, University of São Paulo.
,
Gislaine Ferro Cordeiro
4   Master in Sciences of Otolaryngology. Doctorate. Department of Otolaryngology, School of Medicine, University of São Paulo.
,
Domingos Hiroshi Tsuji
5   Professor in the Department of Otolaryngology, School of Medicine, University of São Paulo.
,
Arlindo Neto Montagnoli
6   Doctor in Sciences. Professor in the Department of Electric Engineering of University Federal of São Carlos.
› Author Affiliations
Further Information

Publication History

07 August 2012

04 November 2013

Publication Date:
06 January 2014 (online)

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Summary

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.

Keywords

High-speed digital imaging - Kymography - Voiced vibration - Voice
 

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