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CNN 모델을 이용한 수중음향 자료의 돌고래 휘슬음 자동 분류 연구

Research on Automatic Classification of Dolphin Whistle in Underwater Acoustic Data Using Convolution Neural Network (CNN) Model

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초록

With the advancement of underwater acoustic observation technology and the development of high-performance equipment, passive acoustic monitoring (PAM) has become a widely used method for monitoring ecosystem cetaceans. As the amount of high-resolution acoustic data increases exponentially, researchers continuously strive to automate the classification of marine mammal sounds and improve the speed of acoustic data analysis. This study developed a method for automatically classifying the dolphin whistles of common dolphins, false killer whales, and bottlenose dolphins using a convolutional neural network model. Whistle signals were analyzed using three spectrogram images: Original, median filter, and edge detection. The F1-Scores analysis results for the three data types were 84.40%, 84.65%, and 80.29%, confirming the possibility of automating whistle classification for the three dolphin species. In Case 2 of the F1-Scores, the common dolphin scored 90.90%, the false killer whale scored 80.00%, and the bottlenose dolphin scored 85.71%, indicating that the common dolphin showed relatively high automatic detection. This study contributes to developing an automatic detection and classification technique for cetacean species in South Korea. Long-term underwater acoustic measurement data acquired through PAM can be utilized more effectively in the future.

Abstract

With the advancement of underwater acoustic observation technology and the development of high-performance equipment, passive acoustic monitoring (PAM) has become a widely used method for monitoring ecosystem cetaceans. As the amount of high-resolution acoustic data increases exponentially, researchers continuously strive to automate the classification of marine mammal sounds and improve the speed of acoustic data analysis. This study developed a method for automatically classifying the dolphin whistles of common dolphins, false killer whales, and bottlenose dolphins using a convolutional neural network model. Whistle signals were analyzed using three spectrogram images: Original, median filter, and edge detection. The F1-Scores analysis results for the three data types were 84.40%, 84.65%, and 80.29%, confirming the possibility of automating whistle classification for the three dolphin species. In Case 2 of the F1-Scores, the common dolphin scored 90.90%, the false killer whale scored 80.00%, and the bottlenose dolphin scored 85.71%, indicating that the common dolphin showed relatively high automatic detection. This study contributes to developing an automatic detection and classification technique for cetacean species in South Korea. Long-term underwater acoustic measurement data acquired through PAM can be utilized more effectively in the future.

참고문헌 (46)

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