船舶水下輻射噪音與振動噪音量測

美國國家海洋大氣管理局與國際海事組織海洋環境保護委員會，為共同響應減緩水下噪音對海洋環境和動物衝擊，制定具國際約束力的全球性標準，達到保護海洋生態環境作為。本研究綜整各船級社及國際標準中有關水下輻射噪音量測及船舶振動噪音重要程序，結合水下輻射噪音動態及靜態量測、船艙與機艙振動量測、環境噪音量測及海洋環境參數量測，經水下輻射噪音發現特徵頻率為1,717 Hz及低頻100 Hz以下超過標準限定門檻值；經振動噪音結果得知兩台發電機基頻為13 Hz與15 Hz，艙間振動分析噪音源來自發電機。量測船舶水下輻射噪音與振動，可藉主輔機等噪音源所產生之頻段作為分析水下噪音是否超標或後續艦改善依據，異常頻率峰值可供後續噪音診斷、船舶辨識或減噪之用。

The National Oceanic and Atmospheric Administration (NOAA) and the Marine Environment Protection Committee (MEPC) of the International Maritime Organization (IMO) have collaborated to address the need for mitigating underwater noise impacts on marine life and developing globally binding standards for marine ecosystem protection. This study examines procedures for measuring underwater radiation noise and ship vibration noise across various classification societies and international standards. It integrates measurements from ship cabin and engine room vibrations, dynamic and static underwater noise measurements, environmental noise assessments, and marine environmental parameter measurements. The analysis revealed underwater radiation noise at a signature frequency of 1717 Hz, with sound pressure levels exceeding maximum allowable levels for GL Pt6 Ch24 class notation under the 100 Hz frequency band. Additionally, vibration results indicated fundamental frequencies of 13Hz and 15Hz originating from the generator. Ship underwater noise and vibration measurements offer insights into main engine and auxiliary noise sources, facilitating monitoring for compliance with noise standards or informing ship improvement initiatives. Abnormal peak frequencies can assist in future noise diagnosis, ship identification, or noise reduction efforts.