Ainslie Michael A, Andrew Rex K, Howe Bruce M, Mercer James A
JASCO Applied Sciences (Deutschland) GmbH, Mergenthaler Allee 15-21, 65760 Eschborn, Hesse, Germany.
Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA.
J Acoust Soc Am. 2021 Apr;149(4):2531. doi: 10.1121/10.0003960.
The soundscape of the Northeast Pacific Ocean is studied with emphasis on frequencies in the range 63-125 Hz. A 34-year (1964-1998) increase and seasonal fluctuations (1994-2006) are investigated. This is achieved by developing a simple relationship between the total radiated power of all ocean sound sources and the spatially averaged mean-square sound pressure in terms of the average source factor, source depth, and sea surface temperature (SST). The formula so derived is used to predict fluctuations in the sound level in the range 63-125 Hz with an amplitude of 1.2 dB and a period of 1 year associated with seasonal variations in the SST, which controls the amount of sound energy trapped in the sound fixing and ranging (SOFAR) channel. Also investigated is an observed 5 dB increase in the same frequency range in the Northeast Pacific Ocean during the late 20th century [Andrew, Howe, Mercer, and Dzieciuch (2002). ARLO 3, 65-70]. The increase is explained by the increase in the total number of ocean-going ships and their average gross tonnage.
对东北太平洋的声景进行了研究，重点关注63 - 125赫兹范围内的频率。研究了34年（1964 - 1998年）的增长情况以及季节性波动（1994 - 2006年）。这是通过建立所有海洋声源的总辐射功率与空间平均均方声压之间的简单关系来实现的，该关系涉及平均源因子、源深度和海表面温度（SST）。由此得出的公式用于预测63 - 125赫兹范围内声级的波动，其幅度为1.2分贝，周期为1年，与SST的季节性变化相关，SST控制着声定位测距（SOFAR）通道中捕获的声能数量。还研究了20世纪后期在东北太平洋相同频率范围内观测到的5分贝的增长[安德鲁、豪、默瑟和兹耶丘赫（2002年）。《ARLO 3》，第65 - 70页]。这种增长是由远洋船舶总数及其平均总吨位的增加所解释的。
