Basics of sound propagation in the atmospheric boundary layer

Pierangelo Libianchi*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Simulations of outdoor sound propagation provide predictions of noise emissions from multiple types of sources and potentially for applications of active noise control in open air. Regardless of the model used, accurate estimates of the medium parameters are fundamental to achieve reliable predictions. The expressions that describe parameters such as wind and temperature are different depending on the regime of the atmospheric boundary layer (ABL). This paper is a review of the literature describing these regimes and the Monin-Obukhov Similarity Theory (MOST), which can be used to derive the wind and temperature profile in the atmospheric surface layer (ASL). However, this method is an approximation and, as such, has limits that are important to know since they affect the accuracy of the simulations. This manuscript also presents limitations such as the stability conditions above the ASL that are not included in MOST as described in fundamental micrometeorology works. Furthermore, it simulates the sound field produced by temperature and wind profile typical of a few relevant cases using a wide-angle Crank-Nicholson Parabolic Equation.

Original languageEnglish
Title of host publication4th International Conference on Acoustics and Sound Reinforcement
PublisherAudio Engineering Society
Publication date2024
ISBN (Electronic)9781713889205
Publication statusPublished - 2024
Event4th International Conference on Acoustics and Sound Reinforcement
- Le Mans, France
Duration: 22 Jan 202426 Jan 2024

Conference

Conference4th International Conference on Acoustics and Sound Reinforcement
Country/TerritoryFrance
CityLe Mans
Period22/01/202426/01/2024

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