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Published in: European Archives of Oto-Rhino-Laryngology 2/2019

01-02-2019 | Laryngology

Effects of a simulated system of straw phonation on the complete phonatory range of excised canine larynges

Authors: Jing Kang, Austin Scholp, Jacob Tangney, Jack J. Jiang

Published in: European Archives of Oto-Rhino-Laryngology | Issue 2/2019

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Abstract

Purpose

This study investigated the effects of straw phonation therapy on the aerodynamic and acoustic parameters of the vocal folds at different levels of elongation and subglottal pressure.

Methods

20 excised canine larynges were used in both experimental (straw phonation therapy simulation) and control conditions. Aerodynamic parameters, including phonation threshold pressure (PTP), phonation instability pressure (PIP), phonation pressure range (PPR), phonation threshold flow (PTF), phonation instability flow (PIF), phonation flow range (PFR), were obtained at different levels of vocal fold elongation (0%, 10%, 20%). Acoustic parameters, including fundamental frequency (F0), jitter, shimmer, signal noise ratio (SNR) were detected at different levels of vocal fold elongation (0%, 10%, 20%) and subglottal pressure (15 cmH2O, 20 cmH2O, 25 cmH2O).

Results

Significant decreases in PTP and PTF and significant increases in PIP, PIF, PPR, and PFR occurred in experimental condition at all levels of elongation when compared with control condition. However, no significant changes of acoustic parameters were obtained between conditions at all levels.

Conclusion

At different levels of vocal fold elongation, straw phonation not only lowered the onset of normal voice, but also elevated the onset of chaotic voice, indicating a better voice economy and voice control. Moreover, the improved phonatory range demonstrated that straw phonation had the potential to prevent voice users who have high voice demand from voice fatigue and vocal damage.
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Metadata
Title
Effects of a simulated system of straw phonation on the complete phonatory range of excised canine larynges
Authors
Jing Kang
Austin Scholp
Jacob Tangney
Jack J. Jiang
Publication date
01-02-2019
Publisher
Springer Berlin Heidelberg
Published in
European Archives of Oto-Rhino-Laryngology / Issue 2/2019
Print ISSN: 0937-4477
Electronic ISSN: 1434-4726
DOI
https://doi.org/10.1007/s00405-018-5247-2

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