EXPERIMENTAL APPROACH TO IDENTIFY THE CAMOUFLAGED SIGNALS IN STRUCTURE- BORNE NOISE AND AIR-BORNE NOISE ON SHIPS

The code on mandatory noise limits on board ships, Resolution MSC. 337 ( 91)[1], applies to new ships of 1,600 GT and above, constructed after July 1, 2014, to protect the seafarer from a high noise-induced hearing loss and provide the seafarer with safe working condition and comfort recreation spaces from the effects of exposure to high noise levels. The code originates from Resolution A. 468(XII)[2], but has updated and more stringent requirements compared to this. Especially, the noise limits for accommodation spaces such as cabins, hospitals, offices, mess room and recreation room are 5 dB more stringent. In order to comply with intensified noise limits, careful consideration such as improved cabin noise prediction, accurate noise measurement and efficient and economic noise control techniques should be necessarily given in design stage. In this study, noise control performances such as cabin noise prediction, noise measurement and optimized noise control for the commercial ship has been carried out in design stage to comply with intensified noise limits.