AS 1217.7-1985

Acoustics - Determination of sound power levels of noise sources - Survey method Standards Australia

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Sets out a survey method for determining the weighted sound power level of a device or a machine. The method should not be used when it is feasible to use a more precise method, e.g. where a laboratory hemi-anechoic room is available for the measurements. The method requires that the background noise be at least 3 dB lower than the noise produced by the source.