The introduction of noise sources from commercial or industrial activities close to residential dwellings will most likely require a noise assessment in accordance with BS 4142:2014, Methods for rating and assessing industrial and commercial sound.
The method described in the standard requires measurement of the existing background noise climate in order to quantify the relative impact of any new noise source, which is either measured or predicted.
Once the level of noise attributed to the new noise source is quantified, it may be subject to further penalties for character of noise (such as tonal or impulsive elements) in order to derive a ‘Rated’ noise level.
Finally, the Rated level of noise is compared to the background noise climate to determine the significance of any noise impact.
If the background noise level is found to be exceeded by a significant degree, mitigation and control measures are implemented in order to limit the impact to acceptable levels.