Acoustics, Defence case study

Noise Control from Firing Range

Background

SRL have provided noise assessments for multiple firing ranges across the UK, to determine the likely noise levels generated from proposed new ranges, and the impact on the surrounding environment and nearby noise sensitive receptors. SRL were commissioned to provide a noise impact assessment for a new outdoor firing range within the defence sector.

Challenge

Firing ranges are a unique noise source with sporadic and impulsive noise generated by the use of the range. Consideration must be given to the amount of noise generated over the duration that the range is in use, the propagation of noise whether it be an outdoor or indoor range, and the nearest noise sensitive receptors. SRL have worked on the positioning of an outdoor firing range and other noise mitigation measures such as barriers to protect noise sensitive receptors from high levels of noise.

Solution

SRL conducted an environmental noise survey to obtain baseline noise levels of the surrounding area to inform the assessment. SRL provided acoustic modelling to predict the impact from the discrete high noise levels exceeding 120 dBA. Consideration was required into the positioning of the range, so that the back wall of the range could provide some screening of the noise and minimise noise propagating to nearby residential receptors. The assessment included consideration on the number of firing podiums, differing levels of noise generated from various gun types, hours of operation and typical activity. SRL also determined that a risk assessment would be required for occupational noise at work.