An MMN can be evoked by visual articulatory deviants, provided they are presented in a suitable auditory context leading to a phonetically significant interaction. The recording of an MMN elicited by illusory McGurk percepts suggests that audiovisual integration mechanisms in speech take place rather early during the perceptual processes.

This paper describes the real-time MRI technique and its use for the study of speech production. The two major problems, (i) the simultaneous recording of the MR images and the speech signal and (ii) the synchronisation of the images and of the speech signal, are addressed. Measurement accuracy on real-time images is evaluated by comparison with similar measurements on static MR images. To cite this article: D. Demolin et al., C. R. Biologies 325 (2002) 547-556. © 2002 Académie des sciences / Éditions scientifiques et médicales Elsevier SAS magnetic resonance imaging / speech production Résumé -IRM temps réel et coordination des mouvements articulatoires en production de la parole. Cet article décrit la technique d'IRM temps réel et son application à l'étude de la production de la parole. Des solutions sont proposées aux deux problèmes majeurs liés à l'étude de la parole, à savoir (i) l'enregistrement simultané des images MR et du signal de parole et (ii) la synchronisation de ces deux types de données. La précision de mesures effectuées sur les images temps réels est évaluée par comparaison avec des mesures équivalentes sur des images statiques. Pour citer cet article : D.

This paper provides an overview of previous works on the acoustic parameters of charismatic voice and illustrates MASCharP, a scale for measuring the perception of charisma in voice. A study is then presented on the perception of charisma through the temporal and pitch structure of the voices of an Italian and a French politician. Results show some cultural differences in charisma perception and how acoustic features such as pitch (normal, higher, or lower) and types of pauses (short or long) can affect the Proactive-Attractive and CalmBenevolent dimensions of charisma. The same dimension of charisma can be conveyed by different acoustic correlates of voice by connecting them to the dimension of leader extraversionintroversion.

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