Pinocchio, a biomimetic mechatronic testbed for producing in vitro articulated speech
Résumé
Speech production results from a fine neuro-controlled coordination between breathing, phonatory and articulatory movements.In physical terms, these movements induce fluid-structure-acoustic interactions within the vocal tract. In theframework of source-filter theory (Fant 1960), the aerodynamic phase of speech is often overlooked, yet being of muchimportance for voiced and unvoiced speech sound production (Catford 1977). In the case of voiced speech sound, it istaken into account by myoelastic-aerodynamic theory of phonation (Jan G. Švec et al. 2021), in which glottal constrictionand vocal folds vibration generate aeroacoustic sources. Our aim is to advance our understanding of speech soundproduction by developing a biomimetic in vitro testbed. Over the last thirty years, vocal-fold testbeds have evolved incomplexity and biomimicry. However, most testbeds explore the physics of phonation on geometrically-fixed replicascapable of self-sustained oscillations in fluid-structure interaction, but unable to produce intonative variations. Most ofthe time, the testbeds are not coupled to vocal tract, and whenever they are, the resonant cavities are static 3D-printedtracts. Reproducing in vitro the dynamic movement of speech articulators, such as jaw, tongue, velum and larynx, togetherwith phonation, remains a challenge. We present here the first steps in the design of a biomimetic mechatronic testbedthat would integrate all phonatory and articulatory aspects important for voice and speech production.
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2024_ISSP_pinocchio.pdf (390.42 Ko)
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202301_pinocchio_projetintegrateurENSE3_tongue.mp4 (72.82 Mo)
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2023_0313_plateforme_aero.mp4 (20.69 Mo)
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2024_ISSP_pinocchio_poster.pdf (3.14 Mo)
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