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BSI - BS EN ISO 4871

Acoustics - Declaration and Verification of Noise Emission Values of Machinery and Equipment

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Organization: BSI
Publication Date: 15 August 1997
Status: inactive
Page Count: 24
ICS Code (Noise emitted by machines and equipment): 17.140.20
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, Ld, 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. Ld 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; Ld corresponds to the stated or labelled value, Lc, 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, LWA, the A-weighted emission sound pressure level at specified positions, LpA, and the C-weighted peak emission sound pressure level at specified positions, LpC,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.

Document History

May 31, 2010
Acoustics - Declaration and verification of noise emission values of machinery and equipment
A description is not available for this item.
BS EN ISO 4871
August 15, 1997
Acoustics - Declaration and Verification of Noise Emission Values of Machinery and Equipment
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...

References

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