Atmospheric sound transmission loss at the coast: Modeling turbulence

This work presents progress in an ongoing effort to effectively represent turbulence in a numerical model of atmospheric sound propagation in a near-shore environment. Excess attenuation is predicted with a parabolic equation solver that incorporates turbulence as well as the combined effects of wind and temperature profiles on the sound speed profile. Literature-based turbulence parameters are used to inform model inputs. These previously reported turbulence metrics are compared with turbulence parameters derived from scanning Doppler LIDAR wind profiling measurements. A set of acoustic transmission loss measurements made with concurrent wind, temperature, and water surface roughness measurements provide ground truth for model output comparison. [Work supported by Office of Naval Research Award Nos. N00014-22-1-2492 and N00014-24-1-2437.]