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Material Input

To run any physics simulations, we need to know the governing equation, the domain, boundary condition, and an initial condition (source excitation). The boundary condition plays the most crucial role once the simulation domain (room geometry) is defined. In room acoustics, the boundary condition can be given by three possible parameters: sound absorption coefficient, surface impedance, pressure reflection coefficient. DGM takes pressure-based boundary description, either the surface impedance or pressure reflection coefficient, while GA can take all three types, and eventually use the information of how much sound energy is absorbed.