scope:

Specifies a method for measuring the sound pressure levels on a measurement surface enveloping the source and for calculating the sound power level produced by the source. It gives requirements for the test environment and instrumentation, as well as techniques for obtaining the surface sound pressure level from which the sound power level of the source is calculated leading to results which have a grade 3 accuracy. This Standard is concerned with specification of the basic acoustic requirements for the measurement of noise output of a source located near one or more reflecting plane(s). It is important that specific noise test codes for various types of equipment be established and used according to this Standard. For each type of equipment such noise codes will give detailed requirements on mounting, loading and operating conditions for the equipment under test as well as a selection of the measurement surface and the microphone array as prescribed in this Standard.