Mathieu LAVANDIER
Office: B012
Phone: 33 4 72 04 70 30
Fax: 33 4 72 04 70 41
Email: mathieu.lavandier@entpe.fr
École Nationale des Travaux Publics de l'État – Université de Lyon
Rue Maurice Audin, F- 69518 Vaulx-en-Velin Cedex, France
Activity
Researcher for the Ministry of Ecology, Energy, Sustainable Development and Sea
Research topics
My research aims at understanding and predicting the perceptual mechanisms involved when we are listening to one or several sound sources in a room. The multiple sound reflections on the room boundaries (called reverberation or reverberated sound) are mixed with the direct sound from the sources, and modify the signal at the listener’s ears. My goal is to study the perceptual effects associated with these modifications, and to propose relevant acoustical measurements to describe them.
I study the effect of reverberation on speech segregation, in order to define an acoustical prediction of intelligibility when competing sound sources are present in the room (“cocktail-party” situations). I also work on the perception of reproduced sound, looking for a measure describing the perceived differences between loudspeakers.
I am considering the auditory system as a measurement tool allowing an evaluation of intelligibility and sound quality - by quality I mean “characteristics” rather than “good” or “bad” - and as a subject of study, in order to understand the complex processing involved while we are listening. My goal is to define acoustical measurements relevant for the improvement of auditorycomfort in ordinary rooms, not only in big music halls and amphitheatres. My research can also be applied to vehicles and partially closed spaces (stations, streets …), and to the improvement of hearing-aids.
Publications
PEER-REVIEWED JOURNALS
LAVANDIER M., CULLING J. F.
Prediction of binaural speech intelligibility against noise in rooms
J. Acoust. Soc. Am., 127 (1), pp. 387-399, Jan. 2010
LAVANDIER M., MEUNIER S., HERZOG P.
Identification of some perceptual dimensions underlying loudspeaker dissimilarities
J. Acoust. Soc. Am., 123 (6), pp. 4186-4198, June 2008
LAVANDIER M., CULLING J. F.
Speech segregation in rooms: Monaural, binaural and interacting effects of reverberation on target and interferer
J. Acoust. Soc. Am., 123 (4), pp. 2237-2248, Apr. 2008
LAVANDIER M., HERZOG P., MEUNIER S.
Comparative measurements of loudspeakers in a listening situation
J. Acoust. Soc. Am., 123 (1), pp. 77-87, Jan. 2008
LAVANDIER M., CULLING J. F.
Speech segregation in rooms: Effects of reverberation on both target and interferer
J. Acoust. Soc. Am., 122 (3), pp. 1713-1723, Sept. 2007
LAVANDIER M., HERZOG P., MEUNIER S.
Physical and perceptual estimation of differences between loudspeakers
Comptes Rendus Mecanique (Académie des Sciences), vol. 334, n° 12, pp. 732-736, Dec. 2006
BOOKS OR CHAPTERS
LAVANDIER M.
Enceintes acoustiques : perception et mesures
Acoustique & Techniques, n° 52, pp. 36-42, 2008
LAVANDIER M.
Différences entre enceintes acoustiques : une évaluation physique et perceptive
Thèse de doctorat, Université de la Méditerranée - Aix-Marseille II, 2005 [http://tel.archives-ouvertes.fr/tel-00087414]
Biography
Since 2009: Researcher, Département Génie Civil et Bâtiment, ENTPE (Lyon)
2006-2008: Research Associate, School of Psychology, Cardiff University (United-Kingdom)
2002-2005: Ph.D in Acoustics, Laboratoire de Mécanique et d'Acoustique (Marseille)
2001-2002: MSc in Applied Acoustics, Université du Maine (Le Mans)
1997-2000: MSc in Engineering Physics, I.N.P.G. (Grenoble)
