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Communication Dans Un Congrès Année : 2008

Vocal folds and ventricular bands in interaction: comparison between in-vivo measurements and theoretical predictions

Résumé

Period-doubling occurrences have been found during singing phonations such as Mongolian Kargyraa throat singing or Sardinian A Tenore Bassu singing. The combined vibrations of vocal folds and ventricular bands have been observed during the production of such low-pitch bass-type sounds. The present study aims at better understanding the physical interaction between the ventricular-bands vibration and the vocal-folds self-sustained oscillations. In this paper, the vibratory properties of both vocal folds and ventricular bands in interaction are analysed on a professional singer by means of acoustical, electroglottographic signals and synchronized glottal images obtained by high-speed cinematography. Using the detected glottal and ventricular areas, the aerodynamic behaviour of the laryngeal system is simulated using a simplified aerodynamic modelling previously validated in-vitro on vocal-folds and ventricular-bands replica. An estimate of the subglottal pressure along with the ventricular aperture extracted from the in-vivo data allows a theoretical prediction of the glottal aperture. The in-vivo measurements of the glottal aperture are then compared to the simulated estimations. The influence of the subglottal pressure is also discussed.
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Dates et versions

hal-00371450 , version 1 (27-03-2009)

Identifiants

  • HAL Id : hal-00371450 , version 1

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Lucie Bailly, Nathalie Henrich Bernardoni, Xavier Pelorson, Joël Gilbert. Vocal folds and ventricular bands in interaction: comparison between in-vivo measurements and theoretical predictions. Acoustics 2008 - 155th Meeting of The Acoustical Society of America, Jun 2008, Paris, France. ⟨hal-00371450⟩
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