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Communication Dans Un Congrès Année : 2015

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

Résumé

The study of sound propagation through forested are as 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.
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Dates et versions

hal-01207042 , version 1 (30-09-2015)

Identifiants

  • HAL Id : hal-01207042 , version 1

Citer

Pierre Chobeau, Gwenaël Guillaume, Judicaël Picaut, David Ecotiere, Guillaume Dutilleux. Time-domain simulations of sound propagation in a simplified forest: A parametric study based on the transmission line matrix (TLM) method. INTER NOISE 2015, Aug 2015, SAN FRANCISCO, United States. 12p. ⟨hal-01207042⟩
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