How Much Loading Does Water Resistance Voice Therapy Impose on the Vocal Folds? An Experimental Human Study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00496969" target="_blank" >RIV/61388998:_____/20:00496969 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0892199718303709?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0892199718303709?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jvoice.2018.10.011" target="_blank" >10.1016/j.jvoice.2018.10.011</a>

Result language

angličtina

Original language name

How Much Loading Does Water Resistance Voice Therapy Impose on the Vocal Folds? An Experimental Human Study

Original language description

Water resistance voice therapy applies phonation in to water through a tube. This study investigates how strenuous this therapy can be for the vocal folds in terms of impactstress (IS). It further examines whether it is possible to estimate the IS using the contact quotient (CQ) and maximum derivative from an electroglottogram (EGG). A male participant sustained a rounded back vowel [u:] or [o:] at a comfortable speaking pitch and loudness, and phonated into a silicone ´LaxVox´ tube submerged 2 cm in water. High-speed video laryngoscopy was performed with a rigid scope. Oral air pressure (Poral) was registered in a mouth piece through which an endo-scope was inserted into the larynx. An EGG was recorded. nThe CQ EGG from the EGG and the closed quotient from the glottal width (CQarea) increased, while the maximum glottal amplitude and absolute value of derivative minimum (dmin) and also the derivative maximum from the EGG decreased for phonation into water. Normalized amplitude quotient from the glottal width variational so decreased but the change was not significant. Based on the glottal a reafindings, water resistance therapy does not seem to increase vocal fold loading (in terms of increased IS) even if the increase of CQ area, and CQ EGG suggest so. CQ EGG may qualitatively correspond to that of area, but the reliability of CQ (from the glottal area or the EGG) and the maximum derivative from the EGG as estimates of IS in semi occlusion exercises warrant further studies.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10307 - Acoustics

Project

<a href="/en/project/GA16-01246S" target="_blank" >GA16-01246S: Computational and experimental modelling of self-induced vibrations of vocal folds and influence of their impairments on human voice</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Voice

ISSN

0892-1997

e-ISSN

—

Volume of the periodical

34

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

387-397

UT code for WoS article

000540867600010

EID of the result in the Scopus database

2-s2.0-85057057451