Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0208, USA.
J Acoust Soc Am. 2012 Sep;132(3):EL169-75. doi: 10.1121/1.4740225.
Simultaneous long-term monitoring of underwater sound and ship traffic provided an opportunity to study how low-frequency noise correlated with ocean-based commercial shipping trends. Between 2007 and 2010 changes in regional shipping off southern California occurred as a consequence of economic and regulatory events. Underwater average noise levels measured before and during these events showed a net reduction of 12 dB. Statistical models revealed that a reduction of 1 ship transit per day resulted in 1 dB decrease in average noise. This synthesis of maritime traffic statistics with ocean noise monitoring provides an important step in understanding the magnitude and potential effects of chronic noise in marine habitats.
同时对水下声音和船舶交通进行长期监测，为研究低频噪声与基于海洋的商业航运趋势之间的关系提供了机会。2007 年至 2010 年期间，南加州附近海域的区域航运发生了变化，这是经济和监管事件的结果。在这些事件发生之前和期间测量的水下平均噪声水平显示出净减少 12 分贝。统计模型表明，每天减少一艘船舶过境，平均噪声就会降低 1 分贝。将海上交通统计数据与海洋噪声监测相结合，为了解海洋栖息地中慢性噪声的强度和潜在影响迈出了重要一步。
