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ISO 7574-4:1985

Acoustics -- Statistical methods for determining and verifying stated noise emission values of machinery and equipment -- Part 4: Methods for stated values for batches of machines

This standard has been reviewed and then confirmed in 2012 
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Provides guidelines for determining the labelled value by the labeller and specifies statistical sampling procedures for checking compliance of noise emitted of a lot of machines with its labelled value. Does not deal with the consequences that ensue if the specified value is not confirmed as checked for a lot of machines.


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