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When visual circles become acoustic ellipses: sounds evoking accelerations modify visuo-motor coupling with biological motions

Etienne Thoret 1 Mitsuko Aramaki Lionel Bringoux 2 Richard Kronland-Martinet 1 Sølvi Ystad 1 
1 Sons
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille] : UPR7051
Abstract : Biological motions have a very notable visual processing. When a spotlight is moving on a circle without complying with the 1/3 power law, with accelerations on two opposite parts for instance, it is perceived elliptical (Viviani, 1989). Furthermore, when complying with this law, the motion of a spotlight is perceived uniform while visual accelerations are perceived in the curved parts of a trajectory when it moves at constant velocity (Viviani, 1992). From the auditory point of view, a recent study revealed that the timbre variations of the friction sounds produced when someone is drawing contained enough information to enable the recognition of the 1/3 power law, and moreover to discriminate geometrical shapes to a certain extent (Thoret, 2014). In this study, we investigate the audiovisual integration of biological motions and in particular whether friction sounds can modulate visuo-motor coupling with such motions. In a first experiment based on a Viviani’s protocol (Viviani, 1997), the visuo-motor coupling is investigated in visual open loop and confirmed perceptual motor interactions. A second experiment revealed that auditory perception of sound evoking motions can strongly biased visuo-motor reproduction of a moving spotlight in its geometrical and dynamical properties. These experiments showed that auditory completely shapes visuo-motor coupling. And above all, they evidenced the role of auditory and motor planning in the multisensory integration of motion in a new original fashion opening many theoretical and applicative perspectives.
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Submitted on : Friday, November 21, 2014 - 10:49:41 AM
Last modification on : Tuesday, April 12, 2022 - 10:50:01 AM


  • HAL Id : hal-01085306, version 1


Etienne Thoret, Mitsuko Aramaki, Lionel Bringoux, Richard Kronland-Martinet, Sølvi Ystad. When visual circles become acoustic ellipses: sounds evoking accelerations modify visuo-motor coupling with biological motions. 15th International Multisensory Research Forum (IMRF), Jun 2014, Amsterdam, Netherlands. ⟨hal-01085306⟩



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