Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F13%3A00395103" target="_blank" >RIV/61388998:_____/13:00395103 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model

Popis výsledku v původním jazyce

The contribution compares measurements of phonations: on vowel [u:], into a resonance tube and into a narrow straw for a ?normal and ?soft phonation at the phonation onset. The acoustic impedance of vocal tract was increased by phonation through the tubeinto water loading the phonatory model by the hydrodynamic pressure and bubbling. The measurements were carried out with silicon vocal folds replica joint to the trachea and vocal tract models for vowel [u:] prolonged by a glass tube or by a plastic straw. The results show that phonation onset is given by the airflow rate, which was found constant Q=0.12 l/s for tube, tube in water and straw even if the Psub, Poral and Ptrans varied considerably. It confirms the conclusions of previous studies: a principle controlling mechanism for phonation onset is given by a critical mass flow rate when the vocal folds start to vibrate due to the loss of aeroelastic stability. Only for vowel [u:], the higher F0 than in all other cases resulted accor

Název v anglickém jazyce

Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model

Popis výsledku anglicky

The contribution compares measurements of phonations: on vowel [u:], into a resonance tube and into a narrow straw for a ?normal and ?soft phonation at the phonation onset. The acoustic impedance of vocal tract was increased by phonation through the tubeinto water loading the phonatory model by the hydrodynamic pressure and bubbling. The measurements were carried out with silicon vocal folds replica joint to the trachea and vocal tract models for vowel [u:] prolonged by a glass tube or by a plastic straw. The results show that phonation onset is given by the airflow rate, which was found constant Q=0.12 l/s for tube, tube in water and straw even if the Psub, Poral and Ptrans varied considerably. It confirms the conclusions of previous studies: a principle controlling mechanism for phonation onset is given by a critical mass flow rate when the vocal folds start to vibrate due to the loss of aeroelastic stability. Only for vowel [u:], the higher F0 than in all other cases resulted accor

Druh

O - Ostatní výsledky

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/GAP101%2F12%2F1306" target="_blank" >GAP101/12/1306: Biomechanické modelování tvorby lidského hlasu - cesta k umělým hlasivkám</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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