About the accuracy for indoors Determination of guaranteed Sound power level

Abstract

The uncertainties due to product variation and measurement procedures should be added to the measured sound power level and must be estimated during test of equipment described in directive 2000714/EC. At the same time provisions of directive is insufficient for assessment of uncertainties, while standards do not completely deal with uncertainties in measurements too. The case study was carried out by estimation some measurement uncertainties during determination of Sound Power Level of compressors, described in directive as item 9. Was shown how environmental corrections K2A., as well measurement surface influence the uncertainties when measurements carried out in indoor test site.