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PIV Measurement of Flow-Patterns in a Human Vocal Tract Model
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SYSNO ASEP 0326251 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title PIV Measurement of Flow-Patterns in a Human Vocal Tract Model Title PIV měření rychlostního pole v modelu vokálního traktu člověka Author(s) Horáček, Jaromír (UT-L) RID, ORCID
Šidlof, Petr (UT-L) RID
Uruba, Václav (UT-L) RID, ORCID
Veselý, Jan (UT-L)
Radolf, Vojtěch (UT-L) RID, ORCID
Bula, Vítězslav (UT-L) RIDSource Title Proceedings NAG/DAGA 2009. - Rotterdam : NAG and DEGA, 2009 / Boone M. M. - ISBN 978-3-9808659-6-8 Pages s. 1737-1740 Number of pages 4 s. Publication form CD-ROM - CD-ROM Action German Annual Conference on Acoustic (DAGA) /35./ Event date 23.05.2009-26.05.2009 VEvent location Rotterdam Country NL - Netherlands Event type WRD Language eng - English Country NL - Netherlands Keywords biomechanics of voice ; glottal flow modelling ; artificial vocal folds Subject RIV BI - Acoustics R&D Projects GA101/08/1155 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The contribution describes developed complex physical model of the voice production that consists of the trachea, the self-oscillating vocal folds and the vocal tract with acoustical spaces corresponding to the vowel /a:/. The measurement set-up enabled to use the time-resolved PIV method for visualization of the airflow-pattern and synchronous vocal fold vibration, acoustic and pressure measurements. Preliminary results are presented for measurements performed within a physiologically range of mean air flow rates and fundamental frequencies. Flow structures resembling large vortices with dimensions comparable with the channel cross-section is possible to see above the ventricular folds. The vortices disappear in the narrowest epilaryngeal part of the vocal tract where the flow is uniform. Large eddies of a size comparable with the channel height were observed in the model of the mouth cavity where the airflow was attached to one wall of the channel resembling a Coanda effect. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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