Sound Absorption and Sound Power Measurements in Reverberation Chambers Using Energy Density Methods
Measurements in a reverberation chamber use spatially averaged squared pressure to calculate sound absorption, sound power, and other sound measurements. While a reverberation chamber provides an approximation of a diffuse sound field, variations in the measurements introduce uncertainty in measurem...
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| Format: | Others |
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BYU ScholarsArchive
2006
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| Online Access: | https://scholarsarchive.byu.edu/etd/771 https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1770&context=etd |
| Summary: | Measurements in a reverberation chamber use spatially averaged squared pressure to calculate sound absorption, sound power, and other sound measurements. While a reverberation chamber provides an approximation of a diffuse sound field, variations in the measurements introduce uncertainty in measurement results. Room qualification procedures require a sufficient number of source-receiver locations to obtain suitable measurements. The total acoustic energy density provides greater spatial uniformity than squared pressure, which requires fewer source-receiver positions to produce similar or better accuracy in measurement results. This paper explores the possibility of using energy density in place of squared pressure, using methods outlined in current ISO standards, by describing several experimental and analytical results. |
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