In this work, a novel approach for the accurate prediction of acoustic environments is presented. A well-established pressure-based unstructured mesh solver is utilized to efficiently and accurately predict complex acoustic physics, and a density-based high-order accurate discontinuous Galerkin solver is used to accurately propagate acoustic waves across large distances. The two solvers operate on separate overlapping meshes and an innovative overset coupling approach is used to transmit the acoustic signal to the farfield in a one-way manner in which the prediction of acoustics generation is unaffected by the outer acoustic propagation physics. The framework upon which the solvers are developed is described along with details outlining the overset grid assembly and interpolation methods. Detailed comparisons are made with a previously verified fully density-based approach, and results are presented which demonstrate the accuracy of the capability for aeroacoustic predictions. The method is shown to be effective and accurate in terms of comparison of predicted pressure fluctuations with analytical solutions for acoustic scattering benchmark problems.
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