Acoustic simulation of alveolar trills using lumped self-oscillating models of the tongue tip - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2017

Acoustic simulation of alveolar trills using lumped self-oscillating models of the tongue tip

Résumé

This paper investigates the possibility to model the self-sustained oscillations of the tongue tip during the production of alveolar trills. Using a realistic geometry of the vocal tract, derived from cineMRI data of a subject, it first compares the mechanical behavior of two lumped mechanical models of the tongue tip: a single-mass and a two-mass model. Simulations show that the two-mass model generates small phase shifts between the upstream and downstream parts of the tongue tip, suggesting a behavior similar to the single-mass model. The two-mass model is also less responsive than the single-mass model to the variations of the instantaneous acoustic pressure upstream of the lingual constriction due to the oscillations of the vocal folds. For this reason, the two-mass model should be favored when dealing with acoustic simulations of alveolar trills. The paper also proposes a solution to simulate an incomplete occlusion of the vocal tract during linguopalatal contacts by adding a lateral acoustic waveguide. This allows all kinds of situation experimentally observed during the production of alveolar trills to be simulated. The simulation framework is used to study the impact of a set of parameters on the characteristics of the produced alveolar trills. It shows that the production of trills is favored when the tongue tip position is slightly away of the hard palate, and when the glottis is fully adducted.
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Dates et versions

hal-01525882 , version 1 (22-05-2017)
hal-01525882 , version 2 (16-08-2017)
hal-01525882 , version 3 (08-11-2017)

Identifiants

  • HAL Id : hal-01525882 , version 1

Citer

Benjamin Elie, Yves Laprie. Acoustic simulation of alveolar trills using lumped self-oscillating models of the tongue tip. 2017. ⟨hal-01525882v1⟩
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