Stafford K M, Fox C G, Clark D S
Department of Fisheries and Wildlife, Oregon State University, Newport 97365, USA.
J Acoust Soc Am. 1998 Dec;104(6):3616-25. doi: 10.1121/1.423944.
Analysis of acoustic signals recorded from the U.S. Navy's SOund SUrveillance System (SOSUS) was used to detect and locate blue whale (Balaenoptera musculus) calls offshore in the northeast Pacific. The long, low-frequency components of these calls are characteristic of calls recorded in the presence of blue whales elsewhere in the world. Mean values for frequency and time characteristics from field-recorded blue whale calls were used to develop a simple matched filter for detecting such calls in noisy time series. The matched filter was applied to signals from three different SOSUS arrays off the coast of the Pacific Northwest to detect and associate individual calls from the same animal on the different arrays. A U.S. Navy maritime patrol aircraft was directed to an area where blue whale calls had been detected on SOSUS using these methods, and the presence of vocalizing blue whale was confirmed at the site with field recordings from sonobuoys.
对美国海军的声学监视系统（SOSUS）记录的声学信号进行分析，以检测和定位东北太平洋近海的蓝鲸（Balaenoptera musculus）叫声。这些叫声的长低频成分是世界其他地方有蓝鲸存在时所记录叫声的特征。利用现场记录的蓝鲸叫声的频率和时间特征的平均值，开发了一种简单的匹配滤波器，用于在嘈杂的时间序列中检测此类叫声。将该匹配滤波器应用于西北太平洋沿岸三个不同SOSUS阵列的信号，以检测并关联来自不同阵列上同一动物的个体叫声。一架美国海军海上巡逻机被引导至使用这些方法在SOSUS上检测到蓝鲸叫声的区域，并用声呐浮标的现场记录在该地点确认了有发声的蓝鲸存在。
