High frequency components of ship noise in shallow water with a discussion of implications for harbor porpoises (Phocoena phocoena)
High frequency components of ship noise in shallow water with a discussion of implications for harbor porpoises (Phocoena phocoena)
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DOI：
10.1121/1.4893908
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发表时间：
2014-10-01
影响因子：
2.4
通讯作者：
Madsen, Peter T.
中科院分区：
文献类型：
--
作者：
Hermannsen, Line;Beedholm, Kristian;Madsen, Peter T.
全球船舶交通量的增长导致船舶噪音增加，可能对海洋生物产生负面影响。大多数研究都集中在船舶噪声的低频分量上，但对于高频专家，如港口鼠海豚（Phocoena phocoena），中高频噪声分量可能更受关注。为了测试中高频船舶噪声的生物相关水平，在丹麦四个船舶交通繁忙的海洋栖息地使用宽带记录系统记录了不同类型的自动识别系统定位的船舶。来自一系列不同船舶类型的船舶噪声在60米至1000米范围内的整个记录频带（从0.025 kHz至160 kHz）内显著提高了环境噪声水平。据估计，这些船舶噪音水平会导致听力范围下降>20 dB（在1和10 kHz时），来自距离1190 m处通过的船舶，且降低>30 dB（125千赫）。得出的结论是，各种各样的船只产生大量的高频噪音，齿鲸的听觉是最敏感的，在评估噪声对鼠海豚和其他小型齿鲸的影响时，应在较宽的频率范围内考虑船舶噪声。(C)2014年美国声学学会。
Growing ship traffic worldwide has led to increased vessel noise with possible negative impacts on marine life. Most research has focused on low frequency components of ship noise, but for high-frequency specialists, such as the harbor porpoise (Phocoena phocoena), medium-to-high frequency noise components are likely more of a concern. To test for biologically relevant levels of medium-to-high frequency vessel noise, different types of Automatic Identification System located vessels were recorded using a broadband recording system in four heavily ship-trafficked marine habitats in Denmark. Vessel noise from a range of different ship types substantially elevated ambient noise levels across the entire recording band from 0.025 to 160 kHz at ranges between 60 and 1000 m. These ship noise levels are estimated to cause hearing range reduction of >20 dB (at 1 and 10 kHz) from ships passing at distances of 1190m and >30 dB reduction (at 125 kHz) from ships at distances of 490m or less. It is concluded that a diverse range of vessels produce substantial noise at high frequencies, where toothed whale hearing is most sensitive, and that vessel noise should be considered over a broad frequency range, when assessing noise effects on porpoises and other small toothed whales. (C) 2014 Acoustical Society of America.