Knowing the reverberant level is vital in room acoustics, however, it is poorly predicted by conventional measures. The paper presents the results from a continuing series of experiments on the loudness of running reverberation. It also proposes a method for determining the reverberant loudness from a measured impulse response and provides some insight into how : reverberation is perceived. Optimum reverberant levels for music depend strongly on the reverberation decay shape and the degree of musical masking. When masking is high, small changes in reverberant level can have large perceptual effects.
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