BS4142 Noise Assessments
BS4142 Noise Assessment is used to support planning applications for the introduction of industrial type noise sources into residential areas. They ensure existing background noise levels in a residential area are not exceeded due to the introduction of industrial/commercial equipment. A BS4142 Noise Assessment is required before instaulation of types of mechanical plants which may give rise to noise complaints. . These include air conditioning units, ventilation equipment and water pumps.
The BS4142 Noise Assessment compares the noise source with the existing background noise levels at the nearest sensitive residential building. The background noise is normally measured at the residential building for a period of 24 hours. This assesses the day and night time background noise levels.
Following analysis and the application of distance corrections and other factors to the data in accordance with BS4142, the difference between the source and existing noise level is determined. A difference of +10dB is a positive indication that complaints are likely. A difference of +5dB is said to be of marginal significance. A difference of -10dB is a positive indication that complaints are unlikely.
UKBC have a good understanding of plant installations and the necessary experience to select intelligent microphone location in order to accurately assess the effects plant noise. Call us today on 01455 634 855 or email if you have any queries.