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the_vibratory_pattern_of_the_vocal_folds_in_various_registrations_of_the_artistic_voice._evidence_from_videokymography [2014/04/01 20:38] (current)
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 +Felix De Jong 1,2, W. Decoster 3, S. Vandertwee 3, L. Decruy 3, Harm K Schutte 4 (The Netherlands, Belgium)
 +**The vibratory pattern of the vocal folds in various registrations of the artistic voice. Evidence from Videokymography**
 +1. Department of ENT – Head and Neck Surgery, University Hospitals KU Leuven, Leuven, Belgium.\\
 +2. Department of ENT, Bernhoven Hospital, Uden, \\
 +3. Research Group ExpORL, Department of Neuroscience, KU Leuven, Leuven, Belgium\\
 +4. Voice Research Lab. Groningen, Groningen, The Netherlands\\
 +Classically, two registers are discerned in the human voice: the chest register and the falsetto register. The mucosal wave of the vocal fold mucosa of the chest voice is characterised by a large amplitude and a long closed phase. In the falsetto register the amplitude is small and the closed phase is short. The transition from the one to the other register can be abrupt e.g. in yodelling. It is not precisely known how the mucosal wave behaves during register transitions. This is because of the lack of real-time visualisation techniques with adequate resolution. The transition cannot be visualised by laryngostroboscopy because the triggering of the stroboscopic light takes several cycles. The latest generation of the videokymograph of Cymo® (Groningen, The Netherlands) enables registration of 7200 lines/second, that is sufficient for adequate registration of the mucosal waves during abrupt register transition. The aim of this study was to assess the mucosal wave changes during register transition. The Cymo® videokymograph in combination with a rigid endoscope was used. The data were recorded by rpSzene® of Rheder and Partner (Hamburg, Germany). Register change was assessed in male and female voices. The mucosal wave was different in the various phonation modes and varied between complete absence of waveform and gradual change from the large amplitude and long closed phase of the chest register to the small amplitude and short closed phase of the falsetto register, and vice versa. The results of this study indicate that during register transition the mucosal wave of the vocal folds behaves differently in the various modes of phonation. Videokymography proved to be an adequate technique to assess the rapid mucosal wave changes.
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