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研究台风“启德”经过南海北部对南海深海海洋环境噪声的影响,表明台风导致的风速增减、降雨强弱以及形成的长波涌浪均会影响海洋环境噪声级的大小变化,海洋环境噪声显著受到台风的影响。相同风级下,台风期间海洋环境噪声级与风速的相关性明显好于非台风期间。分析测量的415 h海洋环境噪声数据与风速、波高的相关性,频率大于300 Hz时,海洋环境噪声级与风速的互相关系数大于0.5,达到中度相关;频率大于630 Hz时,互相关系数介于0.8和0.9之间,达到高度相关;频率大于300 Hz时,海洋环境噪声级与风速的相关性好于海洋环境噪声级与波高的相关性。南海海洋环境噪声10~20 Hz的次声频与风速的相关性差,是因为南海航运繁忙,该频段的海洋环境噪声会受到航船噪声的影响,即使台风期间也不例外。
The research on the influence of typhoon “Kai Tak” on the marine environmental noise in the South China Sea via the northern part of the South China Sea shows that the typhoon-induced increase or decrease of wind speed, the intensity of rainfall and the formation of longwave waves all affect the magnitude of the marine environment noise level. The marine environment The noise is significantly affected by the typhoon. Under the same wind level, the correlation between the noise level of marine environment and wind speed during typhoon is obviously better than that during non-typhoon period. The correlation analysis of the measured 415 h marine environmental noise data with wind speed and wave height shows that the correlation coefficient between the marine environmental noise level and the wind speed is greater than 0.5 and reaches a moderate correlation when the frequency is greater than 300 Hz. When the frequency is greater than 630 Hz, the correlation coefficient Between 0.8 and 0.9, reaching a high degree of correlation; when the frequency is greater than 300 Hz, the correlation between the noise level of the marine environment and the wind speed is better than the correlation between the noise level of the marine environment and the wave height. The low correlation between the infrasound of 10-20 Hz noise in the South China Sea and wind speed is due to the busy shipping in the South China Sea. The maritime environment noise in this band is affected by the ship noise, even during a typhoon.