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Impact stress in a self-oscillating model of human vocal folds
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SYSNO ASEP 0460359 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Impact stress in a self-oscillating model of human vocal folds Author(s) Horáček, Jaromír (UT-L) RID, ORCID
Bula, Vítězslav (UT-L) RID
Radolf, Vojtěch (UT-L) RID, ORCID
Šidlof, Petr (UT-L) RIDSource Title Journal of Vibration Engineering & Technologies - ISSN 2321-3558
Roč. 4, č. 3 (2016), s. 183-190Number of pages 8 s. Publication form Print - P Language eng - English Country IN - India Keywords fluid-structure interaction ; flutter ; biomechanics of voice modeling ; phonation ; aeroelasticity Subject RIV BI - Acoustics R&D Projects GAP101/12/1306 GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000379857200001 EID SCOPUS 84976485548 Annotation The present contribution discusses a measurement of impact stress in a replica of the vocal folds made of silicon rubber excited by airflow with synchronous registration of the flow-induced vocal fold vibrations using a high speed camera, measurement of the subglottal dynamic and mean air pressures and the radiated acoustic pressure. Special miniature contact sensor was used to measure the impact stress between oscillating vocal folds during collisions. The airflow coming to the 1:1 scaled model of trachea was increasing from the phonation threshold up to the airflow rate of 0,6 l/s and subglottal pressure of 2,3 kPa, which is in the range of physiologically relevant values in a normal human voice production. Depending on the flow rate the maximum contact stress, also referred to as the maximum impact stress, was measured from about 1,7 to 2,75 kPa and the vibration amplitude of the glottis, also referred to us the maximum glottal opening, was between 2 and 3,7 mm. The fundamental frequency of self-oscillations of the vocal folds was about 152 Hz. The measured impact stress corresponds to values of 0,4-3,2 kPa, which are found in human excised larynges, as well as to the values numerically simulated by the aeroelastic model of the self-sustained vocal fold oscillations with collisions. 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 2017 Electronic address http://www.tvi-in.com/Journals/journaldetail.aspx?Id=2016062811045074383592dcc719793
Number of the records: 1