Time-domain simulations of sound propagation in a simplified forest: A parametric study based on the transmission line matrix (TLM) method

Pierre Chobeau, Gwenaël Guillaume, Judicaël Picaut, D. Ecotière, G. Dutilleux

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

The study of sound propagation through forested areas remains an important topic for the outdoor sound propagation community. Particularly, forests can be considered as green barriers for reducing road traffic noise annoyance near urban areas or detached buildings. Multiple scattering caused by tree trunks at mid-frequencies and ground absorption at low frequencies, directly impact sound propagation in significantly large forested areas. The modeling of sound scattering coupled to ground effect is investigated using the Transmission Line Matrix (TLM) method. The TLM simulations aim at investigating the impact of the trunks distribution and density. These two parameters are linked to forests characteristics using Ripley and Besag functions. The ground effects on the attenuation of acoustic waves inside forests is implemented using ground absorption coefficients related to in situ measurements. In the present study, the three main factors of interest are the trunks distribution, the density of trunks and the ground reflection coefficient.

Original languageEnglish
Title of host publicationProceedings of the 44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015
EditorsCourtney Burroughs
Pages5632-5643
ISBN (Electronic)978-1-5108-1082-2
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
Event International Congress and Exposition on Noise Control Engineering - San Francisco, United States
Duration: 9 Aug 201512 Aug 2015
Conference number: 44
http://internoise2015.com/

Conference

Conference International Congress and Exposition on Noise Control Engineering
Abbreviated titleINTER-NOISE
CountryUnited States
CitySan Francisco
Period09/08/201512/08/2015
Internet address

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