Abstract
The atmospheric sound propagation over the sea depends on several factors including but not limited to temperature, wind speed, relative humidity, and roughness of the surface. The objective of this study is to determine the contribution to sound transmission loss of the sea surface roughness. The governing equations are implemented for a three-dimensional domain using a finite element method solver. The sea surface is assumed to be perfectly reflective and its shape is pseudo-randomly generated by using the Pierson and Moskowitz model. In previous studies, the cylindrical symmetry approximation has been widely used to allow a fast computation of the equations. However, the implementation of a three-dimensional domain allows a more realistic scenario and is here used as a tool to quantify the deviation from the approximated solution. An appropriate correction factor to be used when applying the cylindrical symmetry approximation is determined.
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