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Shashidhar siddagangaiah 助理教授

0118

姓　　名：Shashidhar siddagangaiah
職　　稱：助理教授
校內分機：2462-2192 ext.6029
電子郵件：shashi18@mail.ntou.edu.tw
最高學歷：西北工業大學 航海學院 博士
研究領域：1.海洋聲學 2.訊號處理3.海洋環境監測與影響評估 4.非線性動力學

個人相關研究：海大研究人才庫
0905

 

Research Overview

 

My research develops underwater-acoustic methods to understand and safeguard the marine soundscapes of the Taiwan Strait. I deploy passive acoustic monitoring (PAM) and design automation and forecasting algorithms that combine nonlinear dynamics (chaos theory) with deep learning and generative-AI techniques. Applied to long-term soundscape records, these tools reveal the biotic, abiotic, and anthropogenic drivers of variability and support rigorous noise-impact assessment. In the context of Taiwan’s rapid wind-energy expansion, I quantify how pile driving, survey and construction vessel traffic, and turbine operations reshape coastal soundscapes and ecology. Current projects span: (1) underwater acoustical remote sensing (PAM networks), (2) big-data/AI automation, (3) long-term time-series trend analysis, and (4) policy-relevant impact assessment.

My work has been published in leading journals, including Communications Earth & Environment (Nature Portfolio), Ecological Indicators, Remote Sensing in Ecology and Conservation, Marine Pollution Bulletin, and Chaos. One of my articles was featured in Nature Climate Change’s Research Highlights. During my postdoctoral fellowship, I received the National Science and Technology Council (NSTC) Outstanding Academic Performance award (2023).

RESEARCH INTERESTS

  • Underwater Acoustics and acoustical signal processing.
  • Deep learning and generative AI in underwater acoustics
  • Nonlinear dynamics and complexity analysis based on entropy methods, chaos theory, and nonlinear analysis of ocean acoustical time series signals.

EDUCATIONAL QUALIFICATIONS

2012 – 2017: Ph.D. Underwater Signal Processing

School of Marine Science and Technology, Northwestern Polytechnical University, Xian, China.

Thesis title: “Nonlinear dynamical analysis of ocean acoustical time series signals”

Supervisor: Prof. Li Yaan

2009 – 2011: M.Tech. in Communication Systems

Department of Electronics and Communication, R.V. College of Engineering, Bangalore, India.

Thesis title: “Modification of array steering algorithms in the presence of dielectric lens”

Supervisor: Prof. S. Ravishankar

2004 – 2008: B.E. Electronics and Communication

Department of Electronics and Communication, Siddaganga Institute of Technology, Tumkur, India.

Thesis title: “Sonar Beamforming”

Supervisor: Prof. Suresh

PROFESSIONAL EXPERIENCE

2024/2 – Current:  Assistant Professor

Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan.

2023/08 – 2024/1: Postdoctoral Research in Marine Mammal Monitoring and conservation

Department of System Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan.

2017/10 – 2023/07: Postdoctoral Research in Underwater Detection and monitoring

Underwater Acoustics Lab, Department of Engineering Sciences and Ocean Engineering, National Taiwan University

HONORS AND AWARDS

  • “Outstanding Researcher” Award from National Science and Technology Council (NSTC), Taiwan (2023)

  • “Top Research Achievement” NTU Annual Handbook (2021-2022) Research on using bioacoustics for detecting the effects of noise and climate change on fish behavior

  • Awarded fellowship from Taiwan’s Ministry of Science and Technology (MOST) (2018 –2023) [Annually renewed based on rigorous review].

  • Chinese Government Scholarship from China Scholarship Council (CSC) (Full scholarship) – For PhD study (2012 – 2017).

  • Awarded Northwestern Polytechnical University’s “Doctoral Dissertation Innovation Fund” for consecutive years 2016 and 2017.

PUBLICATIONS and ACADEMIC WORK

Peer-Reviewed Articles

  1. Siddagangaiah Shashidhar, Chi‐Fang Chen, Wei‐Chun Hu, and Almo Farina. "The dynamical complexity of seasonal soundscapes is governed by fish chorusing." Communications Earth & Environment (2022). IF: 8.1, JCR: Q1
  2. Siddagangaiah Shashidhar. " Marine Soundscape Forecasting: A Deep Learning-based Approach.” Ecological Informatics (2025)  IF: 7.2, JCR: Q1
  3. Siddagangaiah, Shashidhar, Chi Fang Chen, Wei-Chun Hu, Tomonari Akamatsu, and Nadia Pieretti. "Assessing the influence of offshore wind turbine noise on seasonal fish chorusing." ICES Journal of Marine Science (2024). IF:3.1, JCR: Q1
  4. Siddagangaiah, Shashidhar, Chi-Fang Chen, Wei-Chun Hu, Christine Erbe, and Nadia Pieretti. "Influence of increasing noise at the offshore wind farm area on fish vocalization phenology: A long-term marine acoustical monitoring off the foremost offshore wind farm in Taiwan." Marine Pollution Bulletin 208 (2024). IF:5.3, JCR: Q1
  5. Siddagangaiah Shashidhar, Chi-Fang Chen, Wei-Chun Hu, Roberto Danovaro, and Nadia Pieretti. "Silent winters and rock-and-roll summers: The long-term effects of changing oceans on marine fish vocalization." Ecological Indicators 125 (2021): 107456. IF: 7, JCR: Q1; (Featured on Nature Climate Change journal’s research highlights— Armarego-Marriott T. Calling out and listening in. Nature Climate Change. 2021 Apr;11(4):292.) IF: 30
  6. Siddagangaiah Shashidhar, Chi-Fang Chen, Wei-Chun Hu, Tomonari Akamatsu, Megan McElligott, Marc O. Lammers, and Nadia Pieretti. "Automatic detection of dolphin whistles and clicks based on entropy approach." Ecological Indicators 117 (2020): 106559. IF: 7, JCR: Q1
  7. Siddagangaiah Shashidhar, Chi‐Fang Chen, Wei‐Chun Hu, and Nadia Pieretti. "Impact of pile‐driving and offshore windfarm operational noise on fish chorusing." Remote Sensing in Ecology and Conservation (2021). IF: 3.9, JCR: Q1
  8. Siddagangaiah Shashidhar, Yaan Li, Xijing Guo, and Kunde Yang. "On the dynamics of ocean ambient noise: Two decades later." Chaos: An Interdisciplinary Journal of Nonlinear Science 25, no. 10 (2015): 103117. IF: 2.7, JCR: Q1
  9. Wei-Chun Hu, Siddagangaiah Shashidhar* (Corres Auth), Chi-Fang Chen, and Nadia Pieretti. "Impact of vessel transit on vocalizations of the Taiwanese humpback dolphin," Diversity 14, no. 6 (2022) : 426.  IF: 2.1, JCR: Q2
  10. Siddagangaiah Shashidhar, Yaan Li, Xijing Guo, Xiao Chen, Qunfei Zhang, Kunde Yang, and Yixin Yang. "A complexity-based approach for the detection of weak signals in ocean ambient noise." Entropy 18, no. 3 (2016): 101. IF: 2.1, JCR: Q2
  11. Siddagangaiah Shashidhar, Chi-Fang Chen, Wei-Chun Hu, and Nadia Pieretti. "A complexity-entropy based approach for the detection of fish choruses." Entropy 21, no. 10 (2019): 977. IF: 2.1, JCR: Q2

Articles in progress

  1. Siddagangaiah Shashidhar, Chi‐Fang Chen, and Wei‐Chun Hu. " Uncovering the Influence of the Offshore Wind Farm on Acoustic Behavior of Taiwanese White Dolphins with Explainable AI"

International Conferences

  1. Siddagangaiah Shashidhar and S. Ravishankar. "Array steering compensation for the presence of shaped dielectric lenses." IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), Xian, China, 2011.
  2. Siddagangaiah Shashidhar and Yaan Li. “Stochastic modelling and prediction of ocean ambient noise.” ICSV22 conference proceedings, Florence, Italy, 2015.
  3. Siddagangaiah Shashidhar and Yaan Li. "Reduction in the dynamical complexity of the ocean ambient noise in the presence of target." In Ocean Acoustics (COA),  IEEE/OES, Harbin, China, 2016.
  4. Siddagangaiah Shashidhar, and Chi‐Fang Chen. “Silent Winters: Long term study of fish chorusing and evidence of impact of continual shipping noise on fishes” at PRUAC held at Hualien, Taipei, 2018.
  5. Siddagangaiah Shashidhar. "Complexity-entropy based approach for detection of fish choruses." The Journal of the Acoustical Society of America 144, ASA meetings Victoria, Canada, 2018.
  6. Shashidhar Siddagangaiah, and Chen Chi-Fang. Role of Acoustic Indices in assessment of impact of noise on marine mammals. The 14th ICTCA, Beijing, China, 2019.
  7. Shashidhar Siddagangaiah, and Chi-Fang Chen. “Evidence of impact of engine and operating windfarm noise on the singing effort of dolphins”. The Effects of Noise on Aquatic Life Fifth International Conference, Denhaag, Netherland, 2019.
  8. Shashidhar Siddagangaiah, and Chi-Fang Chen. “Automatic detection of dolphin calls”. The Thirteenth Annual Meeting of Asian Fisheries Acoustics Society, AFAS 2019, Keelung, Taiwan, 2019.
  9. Shashidhar Siddagangaiah and Chi-Fang Chen. “Assessment of long-term offshore wind farm noise and its influence on seasonal fish chorusing”. The Effects of Noise on Aquatic Life Sixth International Conference, Berlin, Germany, 2022.
  10. Siddagangaiah Shashidhar, Chi‐Fang Chen, and Wei‐Chun Hu. "Assessment of long-term offshore wind farm noise and its influence on seasonal fish vocalization". OceanNoise2023, Spain, May 22-26, 2022.
  11. Siddagangaiah Shashidhar, Chi‐Fang Chen, and Wei‐Chun Hu. " Uncovering the Influence of the Offshore Wind Farm on Acoustic Behavior of Taiwanese White Dolphins with Explainable AI". SMM2024, Perth, Australia, Nov 11-15, 2024.
  12. Shashidhar Siddagangaiah. “Marine soundscapes off the Taiwan Strait”. IEEE/OES China Ocean Acoustics Symposium, Harbin, China, May 29-31, 2024. (Invited Talk)
  13. Shashidhar Siddagangaiah, Shi-Min Zhang, Chen-Fen Huang, Rong-Juin Shyu, Jin-Yuan Liu. “Do Offshore Wind Farms at Miaoli Cause Acoustic Deterrence to White Dolphin and Fish? Reveals a Short-Term Study at Taiwan Strait”. IEEE UT 2025 Symposium, Taipei, Mar 3-5, 2025.

Journal Reviewer

Worked as a peer-reviewer of an article for journals such as

Ecological indicators (IF:7.3)

Ecological informatics (IF:7.2)

Measurement (IF:5.2)

Marine Pollution Bulletin (IF:5.3)

Ocean and Coastal Management (IF:4.8)

Global Ecology and Conservation (IF:3.5)

Biodiversity and Conservation (IF:3.4)

Energy Science & Engineering (IF:3.5)

Journal of Sound and Vibration (IF:4.3)

Applied Sciences (IF:2.5)

Acoustics Australia (IF:1.8)

Sensors (IF:3.4)

Journal Editor

Currently serving as a Guest Editor for the special issue “Acoustics Sensing, Signal Processing, and Deep Learning Models” in Electronics Journal (IF:2.6)

https://www.mdpi.com/journal/electronics/special_issues/B41D3166M9

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