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Wednesday, July 10 • 16:10 - 16:30

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Exposition to noise can have negative consequences on health and safety, and must therefore be minimized. In specialized and military vehicles, customized acoustic packages are designed for each application, for example to reduce the propagation of noise from the engine compartment to the driver. In order to combine acoustic absorption and insulation with other requirements (fire resistance, vibration damping...), such packages are composed of several layers of different materials. This paper presents a visual tool to assist designers in the choice of materials and stacking order to achieve the best properties while taking into account other constraints such as mass and cluttering. This tool intends to take into account the reality of customized package design, which include the following considerations: (1)~the available materials and thicknesses may be set in advance, preventing the use of optimization methods that could suggest solutions that cannot be built, (2) designers will need to see more than one "best" solution to decide themselves which trade-off should be made between peformance parameters, sometimes by taking into account other non-acoustic considerations such as fire resistance or cost for example. In order to create the chart, a database of all acceptable combinations of available materials is made, along with their acoustic performances computed with the Transfer Matrix Method; the Pareto set is computed from the database: this set represents all solutions for which a property cannot be improved without degrading another property; the chart is a 2D visualization of the Pareto set for three selected properties. The method is applied to a test case highlighting the necessary trade-offs between acoustic absorption, transmission loss and surface density of the package.


francesco Asdrubali

Full Professor, Università Roma Tre - Department of Engineering

Thomas Dupont

Associate Professor, École de Technologie Supérieure (ÉTS)

Philippe Leclaire

Prof., ISAT - University of Burgundy
avatar for Raymond Panneton

Raymond Panneton

Ing., Ph.D., GAUS, Université de Sherbrooke
Raymond Panneton is a professor-researcher in the Department of Mechanical Engineering at the Université de Sherbrooke since 1998. His research program focuses on the modeling, characterization and optimization of porous acoustic media. More specifically, he explores the relationships... Read More →


Wednesday July 10, 2019 16:10 - 16:30 EDT
St-Laurent 5
  T08 Mat. for noise & vibr. cntrl., SS01 Pasv snd absorb & insul mtrl