Vol. 24, issue 12, article # 8

Abstract:

The article presents a review of authors' works devoted to the application of the Monte Carlo method to a solution of the problem of acoustic radiation propagation through the lower 500-meter layer of the plane-stratified turbulent atmosphere. The acoustic model of the atmosphere is considered and the structure and special features of the Monte Carlo algorithm are discussed. The influence of the outer scale of atmospheric turbulence on the transmitted acoustic radiation intensity at frequencies of 1-4 kHz, regional and seasonal variations of the multiple scattering contribution to the transmitted radiation intensity, as well as the influence of cloudiness and source altitude are investigated. Calculated dependences of the transmitted acoustic radiation intensity and multiple scattering contributions on the acoustic radiation frequency, source divergence angle and altitude above the underlying surface, season of the year, and vertical profiles of the atmospheric meteorological parameters are discussed. Good agreement of the calculated total sound attenuation with the available experimental data confirms the reliability of the results of statistical simulation.

Keywords:

atmospheric boundary layer, Monte Carlo method, atmospheric acoustics, propagation of acoustic waves