DS DS/EN 27574-4
DS DSEN 27574-4 1990-DEC-06 Acoustcs - Statstcal methods for determng and verfyng stated nose emsson values of machnery and equpment - Part 4 Methods for stated values for batches of machnes
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The standard provides guidelines for determining the labelled value, Lc, by the labeller and specifies statistical sampling procedures for verifying compliance of the noise emissions of a batch (lot) of machinery and equipment with its labelled value.