![]() To be immersed in a virtual environment, the user must be presented with plausible sensory input including auditory cues. Index Terms-Acoustic fields, architectural acoustics, array signal processing, multipole expansions. For problems that require frequency-domain computations, the algorithm is found to generate sound fields identical to the ones obtained with the frequency-domain version of the Allen–Berkley algorithm at a fraction of computational cost. ![]() ![]() Simulation results are presented, and algorithm accuracy, speed, and implementation details are discussed. The proposed method also has a considerable speed advantage in situations where the room transfer function must be rapidly updated online in response to source/receiver location changes. For offline computation of the room transfer function for image sources and receiver points, use of the Allen–Berkley algorithm requires A operations, whereas use of the proposed method requires only C A operations, resulting in significantly faster computation of reverberant sound fields.
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