Measuring vocal-tract impedance at the lips: model, hypotheses and limits

Timothée Maison (1, 2) , Fabrice Silva (1, 2) , Christophe Vergez (1, 2) , Nathalie Henrich Bernardoni (3)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
2 Sons
3 GIPSA-MOVE - GIPSA - Analyse et Modification de l'homme en mouvement : biomécanique, cognition, vocologie

Non-invasive techniques (such as the so-called RAVE) were developed to characterize vocal-tract acoustics usinga broadband excitation and a microphone positioned closed to the lips. The measured pressure for an open-mouthcondition, calibrated by a mouth-closed reference condition, provides estimates of the radiating vocal-tractresonance frequencies. Recently, exponential-sweep-based methods were reported to measure vocal-tract impedance. We propose to explicit the underlying hypotheses of such approaches, and to test their validity domain.

Mots clés: acoustic resonator; radiation; vocal tract impedance

Domaines: Acoustique [physics.class-ph]; Linguistique

Timothée Maison, Fabrice Silva, Christophe Vergez, Nathalie Henrich Bernardoni. Measuring vocal-tract impedance at the lips: model, hypotheses and limits. ICVPB 2020 - 12th International Conference on Voice Physiology and Biomechanics, Mar 2020, Grenoble (en ligne), France. ⟨hal-02550620⟩