Over deze norm
This International Standard specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in an environment that approximates to an acoustic free-field near one or more reflecting planes. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands or with frequency-weighting A applied, is calculated using those measurements. The methods specified in this International Standard are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. This International Standard is applicable to all types and sizes of noise source (e.g. stationary or slowly moving plant, installation, machine, component or sub-assembly), provided the conditions for the measurements can be met. The test environments that are applicable for measurements made in accordance with this International Standard may be located indoors or outdoors, with one or more sound-reflecting planes present on or near which the noise source under test is mounted. The ideal environment is a completely open space with no bounding or reflecting surfaces other than the reflecting plane(s) (such as that provided by a qualified hemifree- field chamber) but procedures are given for applying corrections (within limits that are specified) in the case of environments that are less than ideal. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with this International Standard, for measurements made in limited bands of frequency and with frequency weighting A applied. The uncertainly conforms with that of the engineering grade of accuracy (grade 2) defined in ISO 12001.
|Nederlandse titel||Akoestiek - Bepaling van geluidvermogenniveaus vanm geluidbronnen met behulp van geluiddrukmetingen - Praktijkmethode voor vrij-veldomstandigheden eden boven een reflecterend oppervlak|
|Engelse titel||Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method for an essentially free field over a reflecting plane|
|Vervangen door||Normatieve verwijzingen||