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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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 tube into 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 according to the theory in the higher airflow rate 0.22 l/s needed for the loss of the system stability. 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 tube into 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 according to the theory in the higher airflow rate 0.22 l/s needed for the loss of the system stability. (en)
Title	Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model (en)
skos:prefLabel	Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model Experimental investigation of vibration, pressure and acoustic characteristics of normal and soft phonations on a physical model (en)
skos:notation	RIV/61388998:_____/13:00395103!RIV14-GA0-61388998
http://linked.open...avai/predkladatel	Ústav termomechaniky AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP101/12/1306)
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Veselý, Jan Horáček, Jaromír Bula, Vítězslav Radolf, Vojtěch
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	74078
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/13:00395103
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	biomechanics of voice; aeroelastic flow and pressure characteristics; vocal folds replica (en)
http://linked.open.../riv/klicoveSlovo	biomechanics of voice aeroelastic flow and pressure characteristics vocal folds replica
http://linked.open...ontrolniKodProRIV	[957DCD2316EC]
http://linked.open...in/vavai/riv/obor	BI
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Biomechanical modeling of human voice production - way to artificial vocal folds
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Bula, Vítězslav Horáček, Jaromír Radolf, Vojtěch Veselý, Jan Laukkanen, A. M.

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