Abstract
In a recent paper, the free-wave and eigenmode models of the sound field in a reverberation chamber were compared, and evidence was presented to support the thesis that the two models were consistent. Here a further piece of this evidence is given. We consider the spatial variance of the mean-square pressure in a reverberant sound field of one frequency which has a mean value of unity. This variance, when calculated from the free-wave model is known to have the value of unity. It is also know that, for one oblique rectangular mode, the corresponding value of the variance is 2.375. It is shown here that for N such modes, whose frequencies coincide but whose phases are uniformly distributed, the variance approaches 1 as N approaches ∞.
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