Impact stress in a self-oscillating model of human vocal folds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F16%3A00460359" target="_blank" >RIV/61388998:_____/16:00460359 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.tvi-in.com/Journals/journaldetail.aspx?Id=2016062811045074383592dcc719793" target="_blank" >http://www.tvi-in.com/Journals/journaldetail.aspx?Id=2016062811045074383592dcc719793</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Impact stress in a self-oscillating model of human vocal folds

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Impact stress in a self-oscillating model of human vocal folds

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Vibration Engineering & Technologies

ISSN

2321-3558

e-ISSN

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Svazek periodika

4

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

IN - Indická republika

Počet stran výsledku

8

Strana od-do

183-190

Kód UT WoS článku

000379857200001

EID výsledku v databázi Scopus

2-s2.0-84976485548