Noise impact assessments can be required for a number of reasons, but commonly they are required so that planning permission can be achieved. A noise impact assessment using BS 4142: 2014 +A1: 2019, is used to determine the impact from specific noise sources. These are commercial and industrial noise sources, such as; a kitchen extractor on a restaurant, an air-con unit on the side of someone’s house, or for an industrial estate. The assessment then determines if these noise sources would have an impact and what can be done to mitigate it.
So what does the assessment involve?
Firstly, a baseline noise assessment is needed to measure the background noise. HA Acoustics use class 1 sound level meters to gather this information.
Secondly, if the plant is in already in situ and in operation, then measurements will be undertaken of the plant in operation.
Next acoustic calculations will be undertaken to determine the impact of the plant on the nearest residential receptors. If the plant is not yet operational manufacturer’s sound levels will be utilised.
If mitigation is required, then HA Acoustics will recommend the most suitable option and specify the performance of mitigation required.
Finally, all of this information will be detailed in a detailed technical report for you to provide to your local authority to support your planning application, or freeholders requirements. Each report is individually tailored to the clients needs.
A Couple of Examples:
For example a recent client of HA acoustics had installed a refrigerator unit to the side of his shop, but was receiving complaints due to the impact of the noise from the unit. We were able to take good acoustic measurements with the refrigerator unit on and off and then specify the correct mitigation, so that it could not be heard above the background at the nearest houses.
Air conditioning units for residential premises are becoming more common across London. We have undertaken a number of assessments like this, many where the best place to install is at roof height on old town houses as the nearest receptors are top floor flats with the air conditioning units being located at roof height out-of-sight. These situations can be challenging, but where access is available to roof heights, you can get a great view overlooking the rooftops of London, whilst securely installing the equipment. Undertaking the survey before installation also means, we can assist with ensuring you get the quietest unit, or best mitigation for your local noise climate.
How can we help?
Here at HA, we will provide you a professional service and tailored Noise Impact Assessment to meet your requirements along with your Local Authority’s requirements. We will undertake the assessment and provide you with a technical report to submit to your Local Authority so that you can get planning permission. So contact us now.