Holistic optimisation of noise reducing devices

T. Leissing (1, 2) , F. Grannec (1) , J. Defrance (1) , P. Jean (1) , D. Lutgendorf (3) , C. Heinkele (4) , J.-P. Clairbois (5)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 MSME - Laboratoire de Modélisation et Simulation Multi Echelle
3 TNO - The Netherlands Organisation for Applied Scientific Research
4 CETE Est - Centre d'études techniques de l'équipement Est
5 ATECH

The work presented in this paper is part of the QUIESST European project, in which one of the objective is to perform multi-objective holistic optimisations of noise reducing devices. We present here optimisation results concerning the extrinsic performances of noise barriers. The performances under interest are acoustical, economical and environmental. The variety of noise barriers considered is very wide, ranging from straight and flat barriers, to rough or capped barriers. A total number of nine noise reducing device families are optimised. Acoustical performances are obtained from numerical calculations: the Boundary Element Method (in 2D) is used to obtain relative sound pressure levels at a set of receivers in different situations. Theses situations include road and rail sources; rural and urban cases; flat, embanked and depressed topographies. The economical performance is calculated according to the maintenance cost of the different materials in use in the barrier. Four environmental performances indicators are considered; their calculation is based on a life-cycle assessment analysis. All performances are expressed as a gain (or loss) relative to a reference screen. It is shown that the optimisation procedure allows one to obtain a wide variety of optimised noise reducing devices, and hence provides a helpful design tool by allowing one to focus on specific parameters.

Mots clés: optimisation; noise reducing device; noise barrier

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

T. Leissing, F. Grannec, J. Defrance, P. Jean, D. Lutgendorf, et al.. Holistic optimisation of noise reducing devices. Acoustics 2012, Apr 2012, Nantes, France. pp.1-2. ⟨hal-00810689⟩