Advanced composite is an energy absorbing material. Noise vibrations through the structure are absorbed which has a noise reducing effect.

Due to their rigidity and non-energy absorbing nature, aluminium - as other metals - are an effective transmitter of noise. In order to reduce internal noise to an acceptable level, acoustic noise-reducing insulation has to be added. To be affective, acoustic insulation needs to be dense and so will increase vessel weight. In addition, under tropical con- ditions these acoustic materials can soak up moisture causing added weight and deterioration of the insu- lation as well as supporting corrosion to the aluminium.