AREAS OF RESEARCH

• Acoustic Radiation and Transmission

• Calculation methods for medium frequencies

• Source identification

• Sound perception

• New materials for acoustics

EXPERIMENTAL RESOURCES

• Sound perception test unit

• Reverberant room

• Engine vibroacoustic bench

Laboratory Director: Jean-Louis GUYADER

Tel. : +33 (0)4 72 43 80 80 - Fax : +33 (0)4 72 43 87 12

Campus LyonTech la Doua - INSA de LyonBâtiment St. Exupéry

25 bis av. Jean Capelle, 69621 Villeurbanne cedex - France

jean-louis.guyader@insa-lyon.fr

VOCATION The LVA laboratory works on the theme of vibro-acoustics, i.e. the study of noise-gene-rating phenomena resulting from the vibrations of structures or the vibrations caused by exposure to noise. The laboratory’s work focuses on understanding these phenomena, their theoretical prediction and their experimental characterisation. There are four key areas of research:

• the studying of phenomena of sound transmission by structures in light (aerial acous-tics) or heavy (submarine acoustics) fluids for excitation conditions from acoustic waves, mechanical forces or turbulence fields,

• the development of predictive methods which take into account random behaviour at medium frequencies and the interest of considering energy quantities in order to obtain robust forecast methods,

• the identification of the vibratory or acoustic sources which cause sound emission phenomena using inverse problems,

• the characterisation of sound perception which integrates the human factor that is so important when looking at noise-related issues. This perception analysis forms the basis of the concept of noise quality used increasingly commonly in industry.

A more recent area of research is coupling with new intelligent, granular materials etc. to create multi-material structures with high insulation or acoustic absorption perfor-mance.

The laboratory has built up strong links with major French and European industrial com-panies in the transport sector. The dual demands of developing fundamental studies and applications characterise the laboratory’s work and make it a key member of the Carnot Institute labelled I@L.

LVAVibrations and Acoustics LaboratoryEA 677

ACHIEVEMENTS

• Party to several European networks and contracts (Visper, Silence, Cantor etc.).

• Creation of an international conference in our field of research (NOVEM 2000 et NOVEM 2005).

• French member of the European Doctorate in Sound and Vibration which groups together major European laboratories to award this European Doctorate.

THE MAIN JOURNALS IN WHICH THE LABORATORY PUBLISHES

• JSV• ACTA ACUSTICA• JASA• APPLIED ACOUSTICS• J. ACOUSTICS and VIBRATION (ASME)

KEY FIGURES

Average annual budget: 500k€

Teacher-Researchers: 9

Administrative staff: 2

Technical staff: 1

Masters students: 8

PhD students: 10

Transfer engineers: 1.5

9

21

8

10

1,5

Vibratory and acoustic environment simulator

Noise mapping of lawnmower blades