A generalized baleen whale call detection and classification system
A generalized baleen whale call detection and classification system
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DOI：
10.1121/1.3562166
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Mussoline, Sarah E.
中科院分区：
文献类型：
--
作者：
Baumgartner, Mark F.;Mussoline, Sarah E.
与传统的目视调查相比，被动声学监测可以在更大的时间和空间尺度上评估海洋哺乳动物的发生和分布。然而，大量的声学数据和人工分析这些数据的漫长而费力的任务阻碍了该技术的广泛应用。为了克服这些限制，开发了一种通用的自动检测和分类系统（DCS），以有效准确地识别低频须鲸叫声。DCS(1)考虑了持续窄带和瞬态宽带噪声，(2)通过音高跟踪表征了主要呼叫频率的时间变化，以及(3)使用二次判别函数分析（QDFA）基于所产生的音高轨道的属性对呼叫进行分类。利用2006年和2007年春季在缅因湾西南部收集的录音，对塞鲸（Balaenoptera borealis）向下鸣叫和北大西洋露脊鲸（Eubalaena glacialis）向上鸣叫的自动检测进行了评估。DCS的准确性与人类分析师相似：DCS和分析师之间差异的可变性与独立分析师之间的可变性相似，呼叫率的时间可变性在DCS和几个分析师之间相似。(C) 2011美国声学学会。(DOI: 10.1121/1.3562166)
Passive acoustic monitoring allows the assessment of marine mammal occurrence and distribution at greater temporal and spatial scales than is now possible with traditional visual surveys. However, the large volume of acoustic data and the lengthy and laborious task of manually analyzing these data have hindered broad application of this technique. To overcome these limitations, a generalized automated detection and classification system (DCS) was developed to efficiently and accurately identify low-frequency baleen whale calls. The DCS (1) accounts for persistent narrowband and transient broadband noise, (2) characterizes temporal variation of dominant call frequencies via pitch-tracking, and (3) classifies calls based on attributes of the resulting pitch tracks using quadratic discriminant function analysis (QDFA). Automated detections of sei whale (Balaenoptera borealis) downsweep calls and North Atlantic right whale (Eubalaena glacialis) upcalls were evaluated using recordings collected in the southwestern Gulf of Maine during the spring seasons of 2006 and 2007. The accuracy of the DCS was similar to that of a human analyst: variability in differences between the DCS and an analyst was similar to that between independent analysts, and temporal variability in call rates was similar among the DCS and several analysts. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3562166]