In recent years, green shipping becomes one of the fundamental challenges for the marine industry: the limits imposed on ship emissions by IMO (International Maritime Organization) are increasingly stringent, especially in terms of SOx (sulfur oxides). The installation on board of scrubbers has proved to be a helpful solution to SOx abetment, in particular for the ships already in navigation:...
In the field of green shipping the reduction of acoustic noise partially transmitted into water and the need of guarantee high comfort levels are important aspects in the view to agree with the UN 2030 Agenda in respect to life below water and good health and well-being. Both these aspects imply actions to increase absorption and dissipation of vibrational energy radiated towards the hull. To...
Until the Industrial Revolution, the concentration of greenhouse gases (GHG) (Carbon Dioxide, Methane, Nitrous Oxide, Ozone) in the atmosphere was quite constant; then human activities – such as burning of fossil fuels, industrial operations and deforestation – increased their concentrations, enhancing the natural greenhouse effect. According to the majority of the climate scientists, the...
In recent years, a growing need has been observed in marine acoustics for the characterisation of low frequency materials below 100 Hz, particularly between 50 Hz and 100 Hz. The problem of sound insulation from airborne and low-frequency impact noise is becoming more and more relevant due to the considerable impact of sound sources at these frequencies, such as audio and video systems in...
The publication of the Lloyd’s Register (LR) notation ‘Procedure for the Determination of Airborne Noise Emission from Marine Vessels’, in addition to port and civil regulations, may in the future result in shipowners requesting certification of the airborne noise levels emitted by their vessels. This certification may be required for access to particular areas of natural interest or to...
