Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering)

Noise and vibration on board ships produced by the operation of ship machinery and equipment generates a huge challenge for crew and passengers. Control of noise in ship cabin presents an important project criterion worth studying. Maintaining noise and vibration levels within standards of IMO ensures adequate comfort onboard ship crew. To control noise under IMO standards, fast-modelling strategies for cabin noise level based on SEA is proposed. By using Vibro-acoustic software (VA-one), an acoustic design of a RO-RO passenger ship is demonstrated. Application of appropriate noise and vibration isolation materials, control treatment and vibration isolation treatment, noise levels within the ship is recorded and analyzed. Analysis show noise levels on enginedecks were not in tune with standards provided by IMO, therefore mechanical vibration materials were used to insulate the decks, results show a noise reduction of 12dB(A). The cabins were also insulated with sound absorbing materials firmly held together using adhesives, application of the sound absorbing material show a noise reduction of 3~8dB(A). The application of the noise reduction techniques on engine decks and in cabins show an overall noise reduction of 3dB (A) ~ 12dB (A) which falls within acceptable noise level limits of 2014 IMO standard.