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ISCApad Archive » 2015 » ISCApad #203 » Events » Other Events » (2015-05-21) Seminaires du GIPSA Grenoble France |
ISCApad #203 |
Saturday, May 16, 2015 by Chris Wellekens |
Jeudi 21 Mai 2015 13h30-14h30 Salle B314 du Département Parole et Cognition (Bâtiment ENSE3, 11 rue des mathématiques, Saint Martin d?Hères)
Pr. David Ostry Motor Control Laboratory, McGill university
![]() Sensory Systems and Speech Motor Learning
Abstract _________________ Jeudi 28 Mai 2015 13h30-14h30 Salle B314 du Département Parole et Cognition (Bâtiment ENSE3, 11 rue des mathématiques, Saint Martin d?Hères)
Matthieu Lavandier Ecole Nationale des Travaux Publics de l'État ? Université de Lyon
Intelligibilité de la parole dans les salles bruyantes : démasquage spatial, réverbération, modulations d?enveloppe et hauteur tonale.
Abstract
La perception de la parole dans le bruit est facilitée par
![]() ![]() _________________
Jeudi 4 Juin 2015 13h30-14h30 Salle B314 du Département Parole et Cognition (Bâtiment ENSE3, 11 rue des mathématiques, Saint Martin d?Hères)
Malinda Carpenter School of Psychology and Neuroscience, university
![]() Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
Beyond imperatives and declaratives: The complexity of infants? pointing and iconic gestures
Abstract In this talk I will present an overview of our work _________________
Jeudi 11 Juin 2015 13h30-14h30 Salle B314 du Département Parole et Cognition (Bâtiment ENSE3, 11 rue des mathématiques, Saint Martin d?Hères)
Christian Herbst Voice Research Lab, Department of Biophysics, Faculty of Science, Palacký university
![]() Laboratory of Bioacustis, Department of Cognititive Biology, university
![]() Elephant on the bench. Ex-vivo investigation of mammalian sound production Abstract
Excised larynx preparations allow studying the biophysics of mammalian sound production under controlled laboratory conditions. Research done in the past decades focused mainly on humans, but recently the approach has been extended to investigating nonhuman mammals. In this presentation, this author will present a partial overview of his own work with excised larynges, with relevance for the fields of bioacoustics and basic voice science. In particular, it will be shown that: Elephants? voice production mechanism for infrasound vocalizations below 20 Hz conforms to the myo-elastic aerodynamic theory of voice production (MEAD). This physical principle thus extends across a remarkably large range of fundamental frequencies and body sizes in mammals, spanning more than four orders of magnitude. A method for visually and quantitatively assessing the regularity of vibrations of systems on the way to chaos is being presented. This method is applied The remainder of the talk is concerned with a critical evaluation of electroglottography (EGG), a low-cost non-invasive impedance measurement method for monitoring some oscillatory aspects of vocal fold vibration. The EGG waveform?s purported correspondence to the time-varying vocal fold contact area was investigated in an excised hemi-larynx experiment involving two high-speed video HSV cameras operating at 6000 fps, synchronized with EGG, and the results suggest a tolerable but not perfect agreement. Furthermore, an investigation of the coincidence of positive peaks in the derivative of the EGG waveform (dEGG) with incidents of glottal closure and opening, utilizing an excised larynx setup with synchronized ultra-HSV at 27000 fps was performed. Results show that dEGG peaks do not necessarily coincide with incidents of glottal closure and opening. Findings from these last two studies suggest that EGG should be interpreted and analyzed with care, and that further research is necessary to establish expected error margins. _________________
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