生物声学
计算机科学
稳健性(进化)
可视化
水下
白噪声
北极
北极的
Python(编程语言)
人工智能
模式识别(心理学)
语音识别
数据挖掘
海洋学
地质学
生物
电信
基因
操作系统
生物化学
作者
Mahdi H. Al-Badrawi,Yue Liang,Kerri D. Seger,Christopher S. Foster,Nicholas J. Kirsch
标识
DOI:10.1038/s41598-022-08184-2
摘要
Tracking species with expanding ranges is crucial to conservation efforts and some typically temperate marine species are spreading northward into the Arctic Ocean. Risso's (Gg) and Pacific white-sided (Lo) dolphins have been documented spreading poleward. Further, they make very similar sounds, so it is difficult for both human analysts and classification algorithms to tell them apart. Using automatic detectors and classifiers on large acoustic datasets would improve the efficiency of monitoring these species. variational mode decomposition (VMD) provides both an easier visualization tool for human analysts and exhibited robustness to background noise while extracting features in pulsed signals with very similar spectral properties. The goal of this work was to develop a new visualization tool using VMD and a statistics-based classification algorithm to differentiate similar pulsed signals. The proposed VMD method achieved 81% accuracy, even when using audio files with low SNR that did not have concurrent visual survey data. While many dolphins whistle, pulsed signals are one of the more useful vocalizations to use in detection and classification because of their species-specific acoustic features. Automating the VMD method and expanding it to other dolphin species that have very similar pulsed signals would complement current detection and classification methods and lead to a more complete understanding of ecosystem dynamics under a changing climate.
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