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Towards an Experimental Benchmark Test Cases Database for the Validation of Numerical Models for Outdoor Sound Propagation

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This paper aims at presenting an extensive measurement campaign achieved under controlled conditions in laboratory above curved surfaces accounting for the curvature of the sound rays in an inhomogeneous medium. The goal of this measurement campaign is to build an experimental database of benchmark test cases for the validation of numerical models for outdoor sound propagation. In this paper some results are given as an illustration for the cases of a noise barrier and an impedance discontinuity. First of all sound propagation in a homogeneous medium is considered. Then meteorological effects are taken into account in the case of a constant positive vertical sound speed gradient. The experimental data are compared satisfactorily to results from a numerical approach based on a model coupling the effects of complex boundaries and the effects of refraction. These results show that experimental benchmark test cases achieved indoors above curved scale models can be reliable and useful for the validation of advanced numerical models for outdoor sound propagation.
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Document Type: Research Article

Publication date: November 1, 2003

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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