Southdowns has been appointed to undertake a noise and vibration monitoring study, in some of the communities around the MOD Pendine and MOD Shoeburyness military test facilities.
QinetiQ, which operates the ranges on behalf of the Ministry of Defence (MOD) has, at the request of the MOD, commissioned this independent Study, to determine the possible effects of damaging noise and vibration effects which may result from the test evaluation and training support activities carried out on the Ranges.
The study requires the monitoring or sound pressure, air overpressure and groundborne vibration at multiple locations of interest in the vicinity of the Ranges.
The monitoring equipment used in the study utilises bespoke software which has been specifically developed and trialled to ensure that data is captured in such a way as to allow for a clear identification of causal link, between Range events and off site effects. Following the triggering of an 'on-site' Master system, all off-site monitors are automatically triggered via a GPS link to to capture signals over a pre-trigger period and for the actual event at the 'off-site' locations.
The data is being processed to quantify the correlation between the range firing logs and the measured signals using digital signal processing and statistical analysis techniques.
The noise and vibration monitoring requires continuous monitoring for 6 months at the Pendine Range first, followed by a further 6 months at the Shoeburyness Range.
The work has also included a comprehensive review of available published research and guidance to ensure that appropriate assessment indicators and effect thresholds have been identified and adopted for the data interpretation phases of the project. The key objectives of the review were to:
- develop an understanding of the acoustic effects of activities which are undertaken on MOD land ranges and evaluate the acoustic characteristics which may cause adverse effects leading to structural damage;
- provide best practice guidance for the measurement of acoustic effects from military land range activities at far-field receptor locations; and
- to develop an understanding of the magnitudes at which such acoustic related effects are likely to cause structural damage to property.
The review considered previous similar studies undertaken in the UK and overseas, as well as relevant British Standards and academic literature, to provide context and technical commentary on the key considerations for the monitoring study.
Site suitability visits were undertaken and a Pilot Study conducted to ensure that project risks were managed effectively prior to the main study deployment.
The Pilot study enabled the effectiveness of a number of risk areas to be tested, including:
- equipment installation and management;
- data management (including storage, transmission, post processing);
- effectiveness of synchronous detection technique;
- importance of local circumstances / conditions;
- telecommunications issues;
- initial view on whether monitoring system provides robust causal link.
In combination with the site suitability studies, the Pilot study helped to provide a more accurate picture of the key monitoring and data management requirements. The main studies are due to be completed in 2015.