Abstract
If less noise radiates from vessels and submarines under water, it is less likely for enemy troops to detect them, which in turn improves the survivability and mission capability of their crews. The Korean Navy thoroughly assesses the structure-borne noise level as a special-performance evaluation item to reduce the underwater radiated noise before loading any equipment. The evaluation is performed at the manufacturing site or in an anechoic chamber, depending on the allowable horizontal support conditions. However, the pre-installation evaluation method does not take into account the influence of inclination conditions during the rolling, pitching, diving, and surfacing of vessels, which may cause its results to differ from the noise levels during an actual operation. This study tests and analyzes the effect a vessel
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