Acoustic simulations 1 Acoustic wave propagation 1 Architectural acoustics 1 Computational efficiency 1 Computationally efficient 1 Coupled-room Efficient simulation 1 Energy transfer 1 Exponential decays 1 Frequency-dependent 1 Incoherent signals 1 Inhomogeneous boundary conditions 1 Inhomogeneous distribution 1 Reverberation 1 Spatial distribution 1 Spatial mapping 1