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Communication Dans Un Congrès Année : 2011

Ventricular folds in speech and singing: physiology, use, physical and perceptual impact

Résumé

Ventricular folds are mucous and fibrous folds located above and in the vicinity of vocal folds. Vocal folds are composed of three layers: mucous, vocal ligament and vocal muscle. The coupling between these layers accounts for their different mechanical vibratory properties. Ventricular folds do not have such a differentiated structure. They are composed of a mucous membrane, adipose tissues and numerous seromucous glands (Kutta et al., 2004) which play a key role in lubrication of laryngeal tissues and air moisture (Kutta et al., 2002). Muscle and ligament fibers exist, however sparse and in the margins. Ventricular folds and vocal ones do not differ only from their histological properties, but also from their mechanical behaviors. Ventricular folds present a greater viscosity and a weaker stiffness than vocal folds (Haji et al., 1992), which makes them a priori poor biomechanical oscillators. Consequently, they are often considered as passive structures for modeling human voice production. However, several studies have shown that these supraglottal structures can move closer to each other, get into contact, and even vibrate for specific speech and singing vocal gestures (e.g. Fuks et al., 1998; Lindestad et al., 2001, 2004; Chevaillier et al., 2009a, 2009b; Bailly et al., 2010). In addition, recent studies have demonstrated that a ventricular constriction may have an aerodynamical impact on the vocal-folds vibratory movement (Bailly et al., 2008). The ventricular folds are often left apart. During this workshop, their anatomy and physiology will be described, on the basis of recent scientific knowledge and observations using highspeed cinematography. Their use in voice production will be discussed, and the possible movements that this supraglottal structure can present will be characterized. Several speech and singing cases will be detailed. Finally, a modeling framework will be developed for studying their physical impact on fluid-structure interactions within the larynx, and the perceptual and acoustical consequences.
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Dates et versions

hal-00744095 , version 1 (22-10-2012)

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  • HAL Id : hal-00744095 , version 1

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Gérard Chevaillier, Lucie Bailly, Nathalie Henrich Bernardoni. Ventricular folds in speech and singing: physiology, use, physical and perceptual impact. PEVOC 2015 - 11th Pan-European Voice Conference, Aug 2011, Marseille, France. ⟨hal-00744095⟩
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