Resonance properties of the vocal folds: in vivo laryngoscopic investigation of the externally excited laryngeal vibrations
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
11051466
DOI
10.1121/1.1289205
Knihovny.cz E-resources
- MeSH
- Video Recording MeSH
- Adult MeSH
- Electrokymography MeSH
- Phonation physiology MeSH
- Vocal Cords physiology MeSH
- Laryngoscopy * MeSH
- Humans MeSH
- Vibration MeSH
- Sound Spectrography * MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Male MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
The study presents the first attempt to investigate resonance properties of the living vocal folds by means of laryngoscopy. Laryngeal vibrations were excited via a shaker placed on the neck of a male subject and observed by means of videostroboscopy and videokymography (VKG). When the vocal folds were tuned to the phonation frequency of 110 Hz and sinusoidal vibration with sweeping frequency (in the range 50-400 Hz) was delivered to the larynx, three clearly pronounced resonance peaks at frequencies around 110, 170, and 240 Hz were identified in the vocal fold tissues. Different modes of vibration of the vocal folds, observed as distinct lateral-medial oscillations with one, two, and three half-wavelengths along the glottal length, respectively, were associated with these resonance frequencies. At the external excitation frequencies below 100 Hz, vibrations of the ventricular folds, aryepiglottic folds and arytenoid cartilages were dominant in the larynx.
References provided by Crossref.org
Application of nonlinear dynamics theory to understanding normal and pathologic voices in humans
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