Experimental and Computational Modeling of the Effects of Voice Therapy Using Tubes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00506116" target="_blank" >RIV/61388998:_____/19:00506116 - isvavai.cz</a>

Result on the web

<a href="https://pubs.asha.org/doi/10.1044/2019_JSLHR-S-17-0490" target="_blank" >https://pubs.asha.org/doi/10.1044/2019_JSLHR-S-17-0490</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1044/2019_JSLHR-S-17-0490" target="_blank" >10.1044/2019_JSLHR-S-17-0490</a>

Result language

angličtina

Original language name

Experimental and Computational Modeling of the Effects of Voice Therapy Using Tubes

Original language description

Purpose: Phonations into a tube with the distal end either in the air or submerged in water are used for voice therapy. This study explores the effective mechanisms of these therapy methods. Method: The study applied a physical model complemented by calculations from a computational model, and the results were compared to those that have been reported for humans. The effects of tube phonation on vocal tract resonances and oral pressure variation were studied. The relationships of transglottic pressure variation in time Ptrans(t) versus glottal area variation in time GA(t) were constructed. Results: The physical model revealed that, for the phonation on [u:] vowel through a glass resonance tube ending in the air, the 1st formant frequency (F1) decreased by 67%, from 315 Hz to 105 Hz, thus slightly above the fundamental frequency (F0) that was set to 90–94 Hz. For phonation through the tube into water, F1 decreased by 91%–92%, reaching 26–28 Hz, and the water bubbling frequency Fb = 19–24 Hz was just below F1. The relationships of Ptrans(t) versus GA(t) clearly differentiate vowel phonation from both therapy methods, and show a physical background for voice therapy with tubes. It is shown that comparable results have been measured in humans during tube therapy. For the tube in air, F1 descends closer to F0, whereas for the tube in water, the frequency Fb occurs close to the acoustic-mechanical resonance of the human vocal tract. Conclusion: In both therapy methods, part of the airflow energy required for phonation is substituted by the acoustic energy utilizing the 1st acoustic resonance. Thus, less flow energy is needed for vocal fold vibration, which results in improved vocal efficiency. The effect can be stronger in water resistance therapy if the frequency Fb approaches the acoustic-mechanical resonance of the vocal tract, while simultaneously F0 is voluntarily changed close to F1.

Czech name

—

Czech description

—

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

2019

Confidentiality

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

Name of the periodical

Journal of Speech Language and Hearing Research

ISSN

1092-4388

e-ISSN

—

Volume of the periodical

62

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

2227-2244

UT code for WoS article

000479123500012

EID of the result in the Scopus database

2-s2.0-85069949631