A new method for the determination of acoustically good room dimension ratios is presented. The method is based on the metric of variation of mean pressure defined as the variation of the mean levels of the sound pressure distribution within a room over a frequency range. This new metric quantifies the overall sound pressure variation within the room and is representative of the evenness of the frequency response among the various listening positions. Simulation results are presented for a small and a larger room where the new index is used to draw maps from which appropriate room proportions can be chosen.
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