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Figure 2: Noise map of the Dutch and German EEZ’s in the N. Sea.

count bathymetry. A noise map is created can be predicted well but more valida- by weighted averaging of the calculated tion data for a wider range of ship types noise levels over depth and frequency, is needed. Results from the SONIC con- an example is shown in Figure 2. Dif- sortium and the EU FP7 ‘Achieve QUi- ferent marine species are affected by eter Oceans by shipping noise footprint different noise frequencies, therefore the reduction’ (AQUO) consortium are sum- noise maps can be created for different marised in a common guidelines docu- frequencies. This type of maps can be ment for regulation, which is publicly used to investigate the in? uence of noise available from the SONIC website. An mitigation measures for the shipping in- early assessment of whether the propel- dustry as a whole. The ? nal noise maps ler design meets noise requirements - as were generated by the Dutch research for instance, de? ned by DNV-GL’s ‘Si- organization TNO. lent Class’ - can be made using compu-

Within the SONIC project MARIN tations and model tests. See www.sonic- has shown that propeller cavitation noise project.eu for more information.

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