Community Research and Development Information Service - CORDIS

On board noise measurement system

SoundBoom is a physical device, which allows a prediction to be made of a vessel's pass by sound levels from simple measurements taken on board. The boom consists of an extending pole with a microphone and wind- shield fitted at one end. Withn the handle of the boom itself is a power supply and amplifier, which is connected to a lap top computer via a USB link. Five sound measurements are taken at predetermined positions on the boat and these are analysed in real time by the lap top computer. On completion of the fifth measurement the predicted 25m pass-by sound level is given.

Analysis of the on board sound levels is carried out using a predictive algorithm which is one of the main outputs from the project. The algorithm is in two parts: the first provides a prediction of the water noise and the second is an empirical method for exhaust noise derived from the data collected during the project.

The overall level of uncertainty has been set at 3dB and the method is not yet accepted for certification.

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United Kingdom
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