In this paper, a unique analysis method for sperm whale clicks based on Hilbert-Huang transform (HHT) is proposed. Four sperm whale click samples with durations of 10 ms (defined as click I), and four sperm whale click samples with durations of 5 ms (defined as click II) were illustrated. These click samples were recorded in the Mediterranean Sea by Centro Interdisciplinare di Bioacusticae Ricerche Ambientali, Università degli Studi di Pavia. The empirical mode decomposition method was used to decompose click I samples into seven intrinsic mode functions (IMFs) and one residue function (RF), and click II samples were decomposed into six IMFs and one RF. The average energy distributions of multiple IMFs and the single RF domain for click I and click II samples were explored using the HHT analysis method. The average energy-frequency representations were also investigated for the same click I and click II samples. The analysis results show that the energy-frequency characteristics of sperm whale clicks can be extracted and understood by applying several IMFs and one RF signal with a high-resolution analysis.
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August 2017
August 01 2017
The energy based characteristics of sperm whale clicks using the Hilbert Huang transform analysis methoda)
Chin-Feng Lin;
Chin-Feng Lin
b)
1
Department of Electrical Engineering, National Taiwan Ocean University
, Keelung City, Taiwan
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Yao-Ching Chung;
Yao-Ching Chung
1
Department of Electrical Engineering, National Taiwan Ocean University
, Keelung City, Taiwan
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Jin-De Zhu;
Jin-De Zhu
1
Department of Electrical Engineering, National Taiwan Ocean University
, Keelung City, Taiwan
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Shun-Hsyung Chang;
Shun-Hsyung Chang
2
Department of Microeletronic Engineering, National Kaohsiung Marine University
, Kaohsiung City, Taiwan
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Chan-Chuan Wen;
Chan-Chuan Wen
3
Department of Shipping Technology, National Kaohsiung Marine University
, Kaohsiung City, Taiwan
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Ivan A. Parinov;
Ivan A. Parinov
4
Vorovich Mechanics and Applied Mathematics Research Institute, Southern Federal University
, Rostov Oblast, Russia
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S. N. Shevtsov
S. N. Shevtsov
5
South Scientific Center of Russian Academy of Sciences
, Southern Federal District, Russia
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b)
Electronic mail: [email protected]
a)
Part of this manuscript appears in the Proceedings of the 2016 International Conference on Physics and Mechanics of New Materials and Their Applications (Nova Science Publishers, New York, 2017), pp. 535–540.
J. Acoust. Soc. Am. 142, 504–511 (2017)
Article history
Received:
February 02 2017
Accepted:
July 10 2017
Citation
Chin-Feng Lin, Yao-Ching Chung, Jin-De Zhu, Shun-Hsyung Chang, Chan-Chuan Wen, Ivan A. Parinov, S. N. Shevtsov; The energy based characteristics of sperm whale clicks using the Hilbert Huang transform analysis method. J. Acoust. Soc. Am. 1 August 2017; 142 (2): 504–511. https://doi.org/10.1121/1.4996106
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