Modeling urban noise exposure and contribution of noise reflection against façades of buildings: Does correction matter?

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Modeling urban noise exposure and contribution of noise reflection against façades of buildings: Does correction matter?

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  Proceedings of Meetings on Acoustics  Volume 19, 2013http://acousticalsociety.org/ ICA 2013 Montreal   Montreal, Canada   2 - 7 June 2013   NoiseSession 5aNSa: Urban Noise and Modeling5aNSa3. Modeling urban noise exposure and contribution of noise reflection againstfaçades of buildings: Does correction matter? Quentin M. Tenailleau*, Nadine Bernard, Sophie Pujol, Daniel Joly, Hélène Houot and Frédéric Mauny   *Corresponding author's address: UMR 6249 "chrono-environnement", Université de Franche-Comté, CMC - Hopital St Jacques,Besançon, 25000, France, France, quentin.tenailleau@univ-fcomte.fr  European noise directives advise to apply corrections when measuring and modelling noise levels close to a building in the aim of excludingthe contribution of noise reflection against the façade. The advised -3 dB correction is still subject to discussion. In order to investigate theneeded correction for a household exposure studies, a high definition noise model was used to estimate noise levels at 10,394 inhabitablebuildings. Three buffers were used to sample area surrounding façades of buildings. The surfaces were defined between the followingdistances: i) 0 and 2m, ii) 0 and 6m, iii) 2 and 6m. No differences between the distribution structures were observed. Mean noise levels do notdiffer significantly between the buffers methods (respectively i) 49.6±6.7 dB, ii) 49.7±6.7 dB, iii) 49.8±6.7 dB ; p<0.01). Same observationcan be made for maximum noise levels (respectively i) 52.0±7.2 dB, ii) 52.5±7.2 dB, iii) 52.4±7.2 dB ; p<0.01). These results show no or lightdifferences between indices computed by the three sampling methods. They are in favour of no or at least a low correction value to deal with thecontribution of noise reflection against the façade of a building.Published by the Acoustical Society of America through the American Institute of Physics Tenailleau et al.© 2013 Acoustical Society of America [DOI: 10.1121/1.4799998]Received 21 Jan 2013; published 2 Jun 2013Proceedings of Meetings on Acoustics, Vol. 19, 040142 (2013) Page 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Tenailleau et al.Proceedings of Meetings on Acoustics, Vol. 19, 040142 (2013) Page 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Tenailleau et al.Proceedings of Meetings on Acoustics, Vol. 19, 040142 (2013) Page 3                                                                                                    Tenailleau et al.Proceedings of Meetings on Acoustics, Vol. 19, 040142 (2013) Page 4                                                                                                                                                                                                                                                                                                                        Tenailleau et al.Proceedings of Meetings on Acoustics, Vol. 19, 040142 (2013) Page 5
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