Application of admittance optimization to the design of a low-height tramway noise barrier

Alexandre Jolibois, Denis Duhamel, Victor W. Sparrow, Jérôme Defrance, Philippe Jean

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

An urban low-height barrier meant to attenuate tramway noise emission for nearby walking pedestrians or cyclists is studied. A numerical method coupling the two dimensional BEM and a gradient-based optimization algorithm is proposed to optimize the admittance distribution on the barrier in order to enhance the broadband insertion loss in the shadowing zone. The gradient of the broadband attenuation is calculated efficiently using the adjoint state approach which makes it possible to use a large number of parameters without significant increase of computation time and to consider a barrier of arbitrary shape. A few admittance designs coupling porous layers and micro-perforated resonant panels covering barriers of classical shapes are proposed, all showing an improvement of several dB(A) compared to more simple admittance distributions.

Original languageEnglish (US)
Title of host publication41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Pages8175-8186
Number of pages12
StatePublished - Dec 1 2012
Event41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 - New York, NY, United States
Duration: Aug 19 2012Aug 22 2012

Publication series

Name41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Volume10

Other

Other41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
CountryUnited States
CityNew York, NY
Period8/19/128/22/12

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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