The SoundBoat project
ISVR Consulting recently undertook research as part of the EU funded 'SoundBoat' project to develop a possible alternative method for measuring the sound emission from recreational craft. The European Recreational Craft Directive sets limits for noise emissions and requires noise measurements to be carried out in accordance with ISO Standard 14509 Small craft - Measurement of airborne sound emitted by powered recreational craft. This standard defines methods which are not entirely practicable: they are highly weather dependent, require very specific test sites, and are consequently very expensive to undertake.
The SoundBoat project aims to provide simpler, less costly methods which can be carried out in a wider range of weather conditions and which will relax the requirements on test sites. Although the noise emissions measured by the new methods would have a wider tolerance, the new methods would avoid the need for the more demanding ISO test except where noise emissions are borderline.
The new methods being developed are loosely based upon the vehicle drive-by tests familiar in the automotive industry. The lead industrial partners in the SoundBoat project are Halyard in the UK and Nanni Diesel in France, with research being carried out by specialist teams from Volvo in Sweden and VTT in Finland as well as by ISVR Consulting in the UK.