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한승진(Seungjin Han),강명환(Myunghwan Kang),이종주(Jongju Lee),김현진(Hyunjin Kim),정현기(Hyungi Jung) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
Underwater radiation noise is an important characteristic in the naval weapon system. In this study, acoustic radiation efficiency of a circular cylindrical structure is measured in the reverberant water tank. It is difficult to measure the radiation efficiency of underwater structure, such as UUV and weapons in real operation environment. Therefore, the structure is excited by interior-shakers and the vibration level and the acoustic radiation power of the structure is measured in the laboratory water tank. Reverberation time is measured and the acoustic radiation power is corrected by subtracting the reverberation sound power level from that measured directly. As a result, the acoustic radiation efficiency is calculated, and it can be used for predicting the underwater radiation noise and effectiveness of radiation reduction means.