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Abstract
The concept of one diffuse sound field has been created in order to define idealized sound field conditions. During several decades, attempts have been made to find a method which would make it possible to measure the field diffusion with sufficient reliability and accuracy. Although the perfectly diffuse field should be measurable by means of quantities such as autocorrelation or statistical distribution of amplitudes, there is no way or scale to express a “degree of diffusion” of some real sound fields. Therefore, the whole concept of diffusion should be revised. New data are presented on the autocorrelation properties of the sound fields in enclosures, and their relations to the statistical distribution of pressure amplitudes are presented. An attempt has been made to find the relation to sound field diffusion.
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