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The possible reduction of underwater radiated noise (URN) from a chemical tanker by running according to a combinatory curve instead of fixed RPM is assessed by model-scale tests in a cavitation tunnel. The model-scale measurements are validated against full scale measurements of URN and full scale cavitation observations. The measurements are performed on the chemical tanker M/T Olympus as part of...
This paper presents spectral analyses of the underwater noise radiated by ships equipped with controllable pitch propellers. The noise measurements were performed at sea for three different ship's types. Each ship passage was characterized by a specific combination of propeller rotational speed and propeller pitch, allowing to investigate the variations of the radiated noise spectrum at different...
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