Laryngeal flow due to longitudinal sweeping motion of the vocal folds and its contribution to auto-oscillation

Débit laryngé dû au balayage longitudinal des plis vocaux et sa contribution à l'auto-oscillation

Henri Boutin (1) , John Smith (2) , Joe Wolfe (2)

1 S3AM - Sound Systems and Signals: Audio/Acoustics, InstruMents
2 UNSW - School of Physics [UNSW Sydney]

Analysis of published depth-kymography data [George, de Mul, Qiu, Rakhorst, and Schutte (2008). Phys. Med. Biol. 53, 2667-2675] shows that, for the subject studied, the flow due to the longitudinal sweeping motion of the vocal folds contributes several percent of a typical acoustic flow at the larynx. This sweeping flow is a maximum when the glottis is closed. This observation suggests that assumption of zero laryngeal flow during the closed phase as a criterion when determining parameters in inverse filtering should be used with caution. Further, these data suggest that the swinging motion contributes work to overcome mechanical losses and thus to assist auto-oscillation.

Domaines: Acoustique [physics.class-ph]; Traitement du signal et de l'image [eess.SP]

Henri Boutin, John Smith, Joe Wolfe. Laryngeal flow due to longitudinal sweeping motion of the vocal folds and its contribution to auto-oscillation. Journal of the Acoustical Society of America, 2015, ⟨10.1121/1.4922470⟩. ⟨hal-02470031⟩