Conference_programme: 19.2 - Outdoor sound propagation

Lecture: Study of a new propagation model in urban acoustics exemplified through a courtyard environment

Author(s): Alexander Lee

Summary:
Noise prediction programs implement regulations such as ISO 9613-2 for the calculation of outdoor sound propagation. In those rules, various sound attenuation effects are taken into account, such as attenuation due to geometrical divergence, atmospheric absorption and ground effects.\nFor short-distance sound propagation in urban areas, the acoustical effects of screening and reflections by buildings are predominant. For better predictions of the sound field in those surroundings, propagation models applied in room acoustic simulations could be considered, given advances in computational capabilities. \nThe noise prediction software “SoundPLANnoise” comprises both sound propagation calculations according to ISO 9613-2 for outdoors and for indoors a sound particle model with a new diffraction model. Applied to the characteristic urban structure of perimeter block development, both modules have to deal with sound propagation into a courtyard with varying façade openings and courtyard sizes. The results of both calculations as well as simulations are compared to measurements of a scale model experiment.

Corresponding author

Name: Mr Alexander Lee

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Country: Germany