Old Rhine ships have to be quiet too
Monday 1 june, 2015, 17:00 - 17:20
0.8 Rome (118)
All ships travelling on the river Rhine have to comply to the regulations of the Central Commission for the Navigation of the Rhine. These regulations include several demands regarding noise levels inside the ship. Currently, Rhine ships built before 1976 are exempt until 2020 when these ships have to comply as well. In 2013-2014 a first study including 4 ships showed that noise levels in these ships are too high. The noise criteria in the bedroom (60 dB(A)) and living room (70 dB(A)) are not met. Over 2500 ships that were built before 1976, are still active. Several trade organisations have warned the Dutch Ministry of Infrastructure and the Environment that the branch will need to invest a lot of money to make their ships more quiet and that this money is not available. The Dutch Ministry has commissioned the Dutch companies DPA Cauberg-Huygen, Level Acoustics & Vibration and Rubber Design to study the noise more specifically. This new study is not only intended to check the results of the first study but has also the goal to search for affordable noise reducing measures and to see if it is possible in certain situations to deal with the noise regulations in a more flexible way. For this study noise and vibration measurements have been carried out in six different types of ships. The vibration measurements were used to find the relevant sound sources and noise paths in the ships. Furthermore a protocol was written for inspectors to easily measure relevant data. Finally a strategy was developed for the ship owners to use, so that they know how much noise reduction they need, what type of measures they can take and how much money is involved.
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