We provide concise Noise Impact Assessment reports for planning applications, supported by clear, pragmatic advice
We minimise project risk by working with our clients to avoid potential noise issues at the earliest stage by providing design advice and identifying appropriate mitigation.
Depending on the type of development proposed, noise impact assessments are generally (but not exclusively) undertaken in line with one of the following methodologies:
- Industrial and Commercial Noise Assessment - BS 4142:2014+A1 Methods for rating and assessing industrial and commercial sound
- Residential Noise Surveys & Assessment - BS 8233:2014 Guidance on sound insulation and noise reduction for buildings
- Construction Noise Monitoring - BS 5228:2009+A1:2014 Code of practice for noise and vibration control on construction and open sites
- Wind Turbine Noise Assessment - ETSU-R-97 The assessment and rating of noise from wind farms
- World Health Organisation (WHO) Guidelines for Community Noise
- Professional Planning Guidance (ProPG): Planning and Noise
What is a Noise Impact Assessment?
Our robust approach to undertaking noise impact assessments ensures your project has the highest chance of consent.
The Process
Consultation
Metrica will consult early with relevant authorities and stakeholders to agree the scope, methodology and assessment criteria for the noise impact assessment for planning. This early consultation helps ensure that your development design aligns with noise requirements from the outset, reducing the risk of delays or redesign.
Noise Survey
Where required, our acoustic consultants carry out a noise survey to monitor background / ambient or operational noise in line with the agreed Local Authority requirements. This may include noise monitoring at nearby sensitive receptors and simultaneous weather monitoring. Observations about the existing noise environment support a contextual assessment. Following the survey, Metrica will analyse the data to establish representative baseline levels.
Noise Modelling and Prediction
Using industry‑standard 3D software, we undertake noise modelling to predict noise levels at key sensitive receptors. The model incorporates source noise data environmental factors such as receptor distances, topography and ground conditions. Metrica then compares predicted numerical and graphical results with the agreed criteria to identify whether mitigation or design changes are required.
Noise Mitigation and Acoustic Design Advice
If predictions indicate exceedances, Metrica will investigate noise mitigation strategies and design changes in close consultation with the project team. Solutions may include relocating plant, selecting quieter equipment, utilising existing structures as shielding, or incorporating acoustic enclosures, noise barriers or attenuators. Metrica generally provides a range of practical options to identify the most suitable solution for your development.
Noise Impact Assessment Report
Once compliant predictions are confirmed, Metrica will produce a clear and concise noise report. This acoustic report outlines survey findings, modelling results, proposed mitigation and an assessment against the agreed criteria. The final report is suitable for submission with your planning application to demonstrate that the development will not result in unacceptable noise impacts.