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Description
The sound field in rooms with non-uniform distribution of absorption or coupled volumes is well known to be subject to distinctly anisotropic reverberation. This is often evident as a multi-exponential energy decay with distinct directional properties. In recent years, the directional energy decay curve has been proposed and applied to investigate and quantify such phenomena. However, it was found that the angular filter response of the receiver array has a strong influence on the angular-temporal evolution of the captured directional energy decay curve.In this contribution we introduce a stochastic energy decay model capable of incorporating the angular filter function response. Based on the stochastic model, we investigate how the limited angular resolution of the receiver array influences the angular-temporal separation of directionally dependent decay processes. Finally, different angular filter functions are compared and with respect to their separation performance.