Existing background noise levels occurring at the nearest houses were measured. Noise data for Wigwam typical operations was based on CSP Acoustics extensive library of industrial noise measurements from prior projects. These included typical workshop joinery and fabrication tools and commercial delivery vehicle movements.
The impact of workshop and yard noise on the nearest residential properties was assessed using the proprietary noise prediction software CadnaA®.
The assessment indicated that mitigation measures were required to reduce noise emissions from the proposed workshop and yard sat the nearest houses in order to comply with Perth & Kinross Council’s criteria. A noise barrier was introduced in the noise model of the site on the north, west and east boundaries; this allowed the optimum height for the barrier to be determined quickly and easily. The assessment demonstrated that the project was viable and the application was granted planning permission by Perth and Kinross Council.
One year later, Wigwam Cabins applied to extend their operational hours and an updated assessment was required. Using the first CadnaA® model it was possible to recalibrate data for the revised working hours, rather than starting from scratch. This also helped the client to obtain a good result quickly and cost-effectively.