Richard Nicollas

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Well-known multimass models of vocal folds are useful to describe main behavior observed in human voicing but their principle of functioning, based on harmonic oscillation, may appear complex. This work is designed to show that a simple one-mass model ruled by laws of relaxation oscillation can also depict main behavior of glottis dynamic. Theory of(More)
First cry has been much studied especially from an acoustical point of view. However, the mechanisms of sound production are unclear. Thus, following studies we previously performed, we extend in this present work our simulations to a more realistic geometry obtained by MRI images of a fetal larynx. This work confirms the major role of vortices and may be(More)
OBJECTIVES/HYPOTHESIS Objectives were 1) to review the presentation, natural history, and management of subglottic hemangioma; 2) to assess the affect of five variables (age, gender, degree of subglottic narrowing, location and extent of subglottic hemangioma, and lack or presence of other hemangioma) and the outcome of six different treatment modalities(More)
Voice of patient with unilateral laryngeal paralysis (ULP) shows a nonlinear behaviour with sudden octave jumps, bifurcations and chaos. Such a behaviour may be due to an increased number of freedom degrees in the glottal system. We hypothesized that voice intensity (with increasing sub glottal pressure) could improve vocal signal stability with less(More)
Palatal myoclonus is an uncommon, rhythmic, "shock-like" involuntary movement of the muscles of the soft palate, throat, and other structures derived from the branchial arcs. Objective tinnitus is frequently neglected in review articles about childhood tinnitus. Our aim was to present the case of a 7-year-old girl with bilateral objective tinnitus due to(More)
Vocal folds of newborns are histologically different from children and adults. Reinke's space is not clearly individualized. As shown by Titze, this structure is absolutely needed for vocal fold vibration [1]. The hypothesis for vocal production in newborn is that the air column generates itself the acoustic turbulences (vortex) from which the sound merges.(More)
Hearing loss due to malformations of the auditory system may involve morphologic abnormalities of the external canal, the middle ear, or the inner ear. Various combined malformations are possible. Audiologic assessment and computed tomography make it possible to perform a precise diagnostic evaluation of inner ear malformations. In a series of 71 children(More)
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