Augmenting road noise engineering methods using the Boundary Element Method (original) (raw)
Exposure to excessive noise is correlated with higher rates of annoyance, sleep disturbance, and other negative health outcomes. Accurately calculating road noise in complex urban environments is fundamental to assessing potential noise mitigation devices and reducing overall noise exposure. However, computing sound propagation in this setting is difficult because cities have complicated geometries and large domains. For example, engineering methods such as ISO-9613-2 or NMPB 2008 efficiently estimate sound levels but cannot model complex geometries like a T-barrier. In addition, detailed approaches such as the boundary element method or the finite-difference time-domain method produce precise results for any geometry but rapidly become too expensive as the frequency and domain size increase. Using a hybrid formulation alleviates these problems. Specifically, the boundary element method yields a table of the corrections for the domain's involved structures for a range of source ...
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