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www.sname.org/sname/mt July 2012 Ven en arious noise criteria?such as the International Maritime Organization?s Code on Noise Levels on board Ships and the American Bureau of Shipping?s (ABS) Guide for Crew Habitability on Workboats?have been developed to protect crew and passengers from high noise levels, both with respect to hear -ing prevention and comfort. In response, tools have been developed to help the naval community meet these criteria in a timely and rational manner. These tools, which should be part a noise control program that addresses scheduling, management, engineering, quality assurance, and compli -ance testing are meant to assess and control noise induced by the numerous and varied sources and unique transmission paths that exist on a marine vessel. As noise issues become more prevalent, the need to apply computer aided design (CAD) tools early in USING COMPUTER AIDED DE SIGN METHODS FOR MO DELING AND PREDICTING NOI SE AND VIBRATION BY RAYMOND FISCHER, JESSE SPENCE, AND RONALD DEMPSEY Figure 1: CAD model of 270 ft. re search vessel, with a side sh ell element in yellow. Approach ASound