How Acoustic Resonances Can Support Self-sustained Oscillations of Acoustic-Mechanical Dynamic System

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00538751" target="_blank" >RIV/61388998:_____/20:00538751 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-981-15-8049-9_24" target="_blank" >http://dx.doi.org/10.1007/978-981-15-8049-9_24</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-15-8049-9_24" target="_blank" >10.1007/978-981-15-8049-9_24</a>

Jazyk výsledku

angličtina

Název v původním jazyce

How Acoustic Resonances Can Support Self-sustained Oscillations of Acoustic-Mechanical Dynamic System

Popis výsledku v původním jazyce

Flutter instabilities of structures aremostly unwanted phenomena in technical applications excluding some energy harvesting systems that utilize wind or water flow-induced aeroelastic instabilities of the systems. Another situation is in biomechanics of voice where the flutter instability of human vocal folds is a necessary condition for singing and speaking, because flow-induced vibrations of the vocal folds create the voice source. The present experimental modelling study shows that the vocal fold self-oscillations can be strongly influenced by interaction with acoustic resonances of the human vocal tract in case when the vocal tract is prolonged by so-called resonance tube used in voice therapy methods. This influence is demonstrated by constructing the relationships of subglottal pressure (pressure drop between trachea and ambient air in front of the mouth) variation in time versus glottal area variation (opening and closing of the glottis). It is shown that a part of the airflow energy required for phonation is substituted by acoustic energy, utilizing the first acoustic resonance.

Název v anglickém jazyce

How Acoustic Resonances Can Support Self-sustained Oscillations of Acoustic-Mechanical Dynamic System

Popis výsledku anglicky

Flutter instabilities of structures aremostly unwanted phenomena in technical applications excluding some energy harvesting systems that utilize wind or water flow-induced aeroelastic instabilities of the systems. Another situation is in biomechanics of voice where the flutter instability of human vocal folds is a necessary condition for singing and speaking, because flow-induced vibrations of the vocal folds create the voice source. The present experimental modelling study shows that the vocal fold self-oscillations can be strongly influenced by interaction with acoustic resonances of the human vocal tract in case when the vocal tract is prolonged by so-called resonance tube used in voice therapy methods. This influence is demonstrated by constructing the relationships of subglottal pressure (pressure drop between trachea and ambient air in front of the mouth) variation in time versus glottal area variation (opening and closing of the glottis). It is shown that a part of the airflow energy required for phonation is substituted by acoustic energy, utilizing the first acoustic resonance.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA19-04477S" target="_blank" >GA19-04477S: Modelování a měření strukturálně-akustických interakcí s prouděním v biomechanice tvorby hlasu člověka</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 14th International conference on vibration problems. ICOVP 2019

ISBN

978-981-15-8048-2

ISSN

2195-4356

e-ISSN

2195-4364

Počet stran výsledku

11

Strana od-do

389-399

Název nakladatele

Springer

Místo vydání

Singapur

Místo konání akce

Hersonissos

Datum konání akce

1. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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