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Simulation of interior vehicle structure-borne noise is typically performed with coupled acoustic-structure finite element models. The structure body mesh and acoustic cavity mesh are usually non-conformal, hence finite element solvers use coupling algorithms based on projected areas to develop the connection between the fluid pressure degree of freedom and the structure displacement degrees of freedom. Robust coupling algorithms need to account for various challenges such as separation and penetration of the meshes, openings in the structure mesh, and overlapping panels in the structure mesh. A new coupling algorithm that uses precise area projections addresses these issues and has been implemented in an FE solver code base. The robustness and accuracy solution is demonstrated by comparison to existing methods. Another challenge with acoustic simulation is to join dissimilar acoustic meshes.