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.
Author:
Libianchi, Pierangelo
Affiliation:
Acoustic Technology Group, Department of Electrical and Photonics Engineering, Technical University of Denmark, Building 352, Ørsted Plads, DK-2800 Kongens Lyngby, Denmark
AES Conference:
AES 2024 International Conference on Acoustics & Sound Reinforcement (January 2024)
Paper Number:
19
Publication Date:
January 23, 2024
Subject:
Acoustics & Sound Reinforcment
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