Abstract
Accurate measurements of sound power using the reverberant room technique are dependent upon sensing the mean of the squared pressure throughout the volume of the room. The present ASHRAE Standard 36-62 specified the use of a linear or circular microphone traverse for spatial sampling. The proposed revision of the ASHRAE Standard extends the sampling techniques to include the use of arrays of multiple microphones. Theoretical investigations of others have compared various forms of spatial sampling and the results indicate that there is some merit to planar and volumetric microphone traverses. Measurements of the effects of linear, planar, and volumetric microphone traverses in a 300-m3 reverberant room (T60 = 13.3 sec at 500 Hz) on the indicated mean of the squared pressure are presented.
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