scope:

This International Standard

- gives information on the declaration of noise emission values,

- describes acoustical and product information to be presented in technical documents for the purposes of noise emission declaration, and

- specifies a method for verifying the noise emission declaration.

It is applicable to machinery and equipment.

The values to be used for the purposes of noise emission declaration are either declared single-number noise emission values, L_d, or declared dual-number noise emission values, L and K, L is a noise emission value determined directly from measurements and K is the uncertainty associated with those measurements. L_d is the sum of L and K and represents an upper limit which values from repeated measurements are unlikely to exceed at a given confidence level; L_d corresponds to the stated or labelled value, L_c, defined in ISO 7574-1.

The two forms of noise declaration are alternative means of representing any or all of the A-weighted sound power level, L_WA, the A-weighted emission sound pressure level at specified positions, L_pA, and the C-weighted peak emission sound pressure level at specified positions, L_pC,peak. The choice as to which of the two forms is used in a particular case depends upon the requirements to be fulfilled. This selection is made, and guidance on the values of K is given, in the appropriate noise test code.

Guidelines for determining declared noise emission values are given in Annex A.