Noise Modelling

What is noise modelling?

Noise modelling is a process of showing different noise levels in different colours over a large area of interest, and appear like contour lines, which represent noise bandwidths, i.e. 5dBA.

However, noise modelling is easiest performed using noise modelling software, as retrospective changes update the noise levels immediately.

Why use noise modelling?

Noise modelling is particular useful when modelling large areas and many noise sources; you would not use noise modelling for one or two point noise sources over a small area, it would be an overkill.

For what is noise modelling typically used?

Noise modelling is typically used for large areas as in the case of environmental noise impact assessments for many noise sources

  • On a construction site, in conjunction with BS 5228 Noise Control on Construction sites

  • Industrial noise, in conjunction with BS4142 Method for rating Industrial Nosie affecting residential and Commercial areas, as in our project example.

  • Railway noise, in conjunction with Calculation of railway noise (CRN)

  • Road noise, in conjunction with Calculation of Road Traffic Noise (CRTN)

Where did we use noise modelling?

Environmentally Sound most recently utilised noise modelling software to obtain planning permission for a recycling plant to obtain planning permission to increase productivity.

After the recycle plant was estalbished in the area, a new housing development sprouted alongside the recycling facility over the last few years. Therefore, a planning application had to be submitted, as the plant could have an impact on the residential area if productivity increased.

The image at the top of this page shows a section of the noise model; housing on the left, and the recycling plant on the right.

How do you know the noise model is representative?

As in any finite element software, the constraints and assumptions made for the model, influence the results. Therefore, we measured all the noise sources on-site using BS4142 and modelled them in the noise modelling software.

But we did more.

We then recorded the noise levels at several locations within the residential neighbourhood to compare with the noise model to ensure that the model was predicting the correct noise levels. These noise levels are affected by the topography of the obstacles like walls, berms and houses, hence the reason to check!

How much does noise modelling cost?

The cost of noise modelling varies with the project, and is mainly time driven, which is dependent on the information that we have and the amount of detail that needs to be modelled. The noise modelling aspect of any project that we perform, is usually in the vicinity £500+VAT per day. In most of our projects, modelling typically takes a day or two. The validation and verification of the model is additional to the cost.

Where to find more information on noise modelling

If you would like more information on noise modelling and/or a quotation for a noise assessment that also requires noise modelling, please email us the details at

We shall reply with a quotation within 24 hours of receipt.