Planning and noise guidance
Any proposed industrial or commercial development needs to assess noise from their activities and where necessary provide mitigation to avoid giving rise to significant adverse impacts on potential receptors. The guidance generally recommends that noise levels within residential properties should not exceed the World Health Organisation values where practicable.
Noise measurement and calculation
BS 4142, BS 8223 and the World Health Guidelines all give values and design ranges for the measurement of noise in certain situations. It is unlikely that anyone other than a qualified noise consultant will be able to carry out an assessment of the noise. A representative assessment will be required to include special circumstances, for example, tonal values, impact noise, number and loudness of individual events, weather conditions and so on.
The assessment needs to cover the noisiest periods, taking into account the character of the area, for example, shift patterns in businesses. The assessment also needs to include the night time noise levels.
Certain information must be recorded including isolated events which would not be represented in an equivalent noise level [LAeq] taken over a longer period, for example, a train which passed at 5:00am, or unpredictable impact noise. High incident noise levels for short periods may cause sleep disturbance.
Daytime LAeq [7:00am to 11:00pm] at representative points around the site or at various facades
Night time LAeq [11:00pm to 7:00am] at representative points around the site or at various facades
LAmax values for the daytime and night time period.
Last updated 04 January 2024