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<!doctype html><html lang=en-us><head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta http-equiv=x-ua-compatible content="IE=edge"><meta name=generator content="Source Themes Academic 4.8.0"><meta name=author content="Echospace"><meta name=description content="Applied Physics Lab & eScience Institute"><link rel=alternate hreflang=en-us href=https://uw-echospace.github.io/><meta name=theme-color content="#085CF8"><script src=/js/mathjax-config.js></script><link rel=stylesheet href=https://cdnjs.cloudflare.com/ajax/libs/academicons/1.8.6/css/academicons.min.css integrity="sha256-uFVgMKfistnJAfoCUQigIl+JfUaP47GrRKjf6CTPVmw=" crossorigin=anonymous><link rel=stylesheet href=https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0-1/css/all.min.css integrity="sha256-4w9DunooKSr3MFXHXWyFER38WmPdm361bQS/2KUWZbU=" crossorigin=anonymous><link rel=stylesheet href=https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.css 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<span><i class="fas fa-bars"></i></span></button><div class="navbar-brand-mobile-wrapper d-inline-flex d-lg-none"><a class=navbar-brand href=/>Echospace @ UW</a></div><div class="navbar-collapse main-menu-item collapse justify-content-start" id=navbar-content><ul class="navbar-nav d-md-inline-flex"><li class=nav-item><a class=nav-link href=/#about data-target=#about><span>Home</span></a></li><li class=nav-item><a class=nav-link href=/#people data-target=#people><span>People</span></a></li><li class=nav-item><a class=nav-link href=/#projects data-target=#projects><span>Projects</span></a></li><li class=nav-item><a class=nav-link href=/#presentations data-target=#presentations><span>Presentations</span></a></li><li class=nav-item><a class=nav-link href=/#publications data-target=#publications><span>Publications</span></a></li><li class=nav-item><a class=nav-link href=/#group data-target=#group><span>Group misc</span></a></li><li class=nav-item><a class=nav-link href=/#positions data-target=#positions><span>Positions</span></a></li><li class=nav-item><a class=nav-link href=/#posts data-target=#posts><span>Posts</span></a></li><li class=nav-item><a class=nav-link href=/#contact data-target=#contact><span>Contact</span></a></li></ul></div><ul class="nav-icons navbar-nav flex-row ml-auto d-flex pl-md-2"><li class=nav-item><a class="nav-link js-search" href=# aria-label=Search><i class="fas fa-search" aria-hidden=true></i></a></li></ul></div></nav><span class="js-widget-page d-none"></span><section id=about class="home-section wg-about"><div class=container><div class=row><div class="col-12 col-lg-4"><div id=profile><img class="avatar avatar-circle" src=/author/echospace/avatar_hu9d4806cfbe0eda278ecba5412048095a_151604_270x270_fill_q90_lanczos_center.jpg alt=Echospace><div class=portrait-title><h2>Echospace</h2><h3>Applied Physics Lab & eScience Institute</h3><h3><span>University of Washington</span></h3></div><ul class=network-icon aria-hidden=true></ul></div></div><div class="col-12 col-lg-8"><h1>Ocean Acoustics + Data Science</h1><p>Our research focuses on active acoustic sensing by humans (machines) and animals.
We integrate physics-based models with data-driven methods to extract information from large ocean acoustic datasets, and study echolocating bats and toothed whales as biological models for adaptive sonar sensing.
In parallel, we develop open-source software and host hands-on workshops to engage and empower the community in advancing acoustic sensing technology.</p><h3 id=research-areas>Research areas:</h3><ul><li>Acoustical oceanography</li><li>Fisheries acoustics</li><li>Animal echolocation / bioacoustics</li><li>Machine learning in ocean acoustics</li><li>Scientific computing and software</li></ul><div class=row></div></div></div></div></section><section id=recent_news class="home-section wg-blank"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Recent news!</h1><p><a href=/news>All news»</a></p></div><div class="col-12 col-lg-8"><p><strong>[09/2025]</strong> Aditya and Wu-Jung published a paper in JASA on <a href=https://doi.org/10.1121/10.0039108>the effects of duty-cycling in PAM of bats</a>!</p><p><strong>[07/2025]</strong> Wu-Jung and YeonJoon published two papers in JASA, on <a href=https://doi.org/10.1121/10.0037038>porpoise movements during target discrimination</a> and <a href=https://doi.org/10.1121/10.0036904>dolphin head-related transfer function prediction</a>!</p><p><strong>[05/2025]</strong> Multiple Echospace members hosted the second <a href=https://boat-ocean-acoustics.github.io/>Bridge to Ocean Acoustics & Technology (BOAT)</a> workshop in New Orleans!</p><p><strong>[03/2025]</strong> Multiple Echospace members will be hosting the first <a href=https://boat-ocean-acoustics.github.io/>Bridge to Ocean Acoustics & Technology (BOAT)</a> workshop in Seattle!</p><p><strong>[02/2025]</strong> Wu-Jung was awarded for the 2025 APL Science and Engineering Achievement Award! Congratulations!</p><p><strong>[02/2025]</strong> Caesar was accepted to the UW ECE PhD program and will start this fall, continuing his research in Echospace! Congratulations, Caesar!</p><p><strong>[10/2025]</strong> <a href=/author/ameena-majeed>Ameena Majeed</a> joined Echospace as an Undergrad Research Assistant. Welcome!</p><p><strong>[08/2025]</strong> <a href=/author/aidan-lee>Aidan Lee</a> joined Echospace as an Undergrad Research Assistant. Welcome!</p></div></div></div></section><section id=people class="home-section wg-people"><div class=container><div class="row justify-content-center people-widget"><div class="col-md-12 section-heading"><h1>Meet the Team</h1></div><div class=col-md-12><h2 class=mb-4>Researchers</h2></div><div class="col-12 col-sm-auto people-person"><a href=/author/wu-jung-lee/><img class="avatar avatar-circle" src=/author/wu-jung-lee/avatar_hue32bd5ea14559ee6625b974cf92f99ba_1703649_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></h2><h3>Principal Oceanographer</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/valentina-staneva/><img class="avatar avatar-circle" src=/author/valentina-staneva/avatar_hu3a8150122309ddcef6dcf623c198fb04_27524_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/valentina-staneva/>Valentina Staneva</a></h2><h3>Senior Data Scientist</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/brandyn-lucca/><img class="avatar avatar-circle" src=/author/brandyn-lucca/avatar_hu095bfd74dfe34174a0df2e0f1b392a66_2719076_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/brandyn-lucca/>Brandyn Lucca</a></h2><h3>Postdoc</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/caesar-tuguinay/><img class="avatar avatar-circle" src=/author/caesar-tuguinay/avatar_hu91f4814411e1234976d159b9f96b7860_33992_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/caesar-tuguinay/>Caesar Tuguinay</a></h2><h3>Graduate Student</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/aditya-krishna/><img class="avatar avatar-circle" src=/author/aditya-krishna/avatar_hu8386a219465815bd5066b8b2549ecf20_24185_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/aditya-krishna/>Aditya Krishna</a></h2><h3>PhD student</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/aidan-lee/><img class="avatar avatar-circle" src=/author/aidan-lee/avatar_hua21ab303e120c2dd4be04f37e283fb55_552804_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/aidan-lee/>Aidan Lee</a></h2><h3>Undergraduate Research Assistant</h3></div></div><div class="col-12 col-sm-auto people-person"><a href=/author/ameena-majeed/><img class="avatar avatar-circle" src=/author/ameena-majeed/avatar_hub60500e32929288d34b2bdec4c330295_28911_270x270_fill_q90_lanczos_center.jpg alt=Avatar></a><div class=portrait-title><h2><a href=/author/ameena-majeed/>Ameena Majeed</a></h2><h3>Undergraduate Research Assistant</h3></div></div><div class=col-md-12><h2 class=mb-4>Alumni</h2></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/dingrui-lei-b41560236/>Dingrui Lei</a></h2><h3 style=margin-top:8pt>Now: Software Engineer at GEICO</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://escience.washington.edu/member/don-setiawan/>Don Setiawan</a></h2><h3 style=margin-top:8pt>Now: Research Software Engineer at UW eScience Institute</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href="https://apl.uw.edu/people/profile.php?last_name=Mayorga&first_name=Emilio">Emilio Mayorga</a></h2><h3 style=margin-top:8pt>Now: Senior Oceanographer at APL-UW</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/soham-butala/>Soham Kishor Butala</a></h2><h3 style=margin-top:8pt>Now: Software Data Operations Engineer at MAQ Software</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://github.com/zhmiao>Zhongqi Miao</a></h2><h3 style=margin-top:8pt>Now: Applied Research Scientist at Microsoft</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://github.com/b-reyes>Brandon Reyes</a></h2><h3 style=margin-top:8pt>Now: HPC specialist at CU Boulder</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://alleninstitute.org/person/imran-majeed/>Imran Majeed</a></h2><h3 style=margin-top:8pt>Now: Software Engineer at Allen Institute</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/derya-gumustel/>Derya Gumustel</a></h2><h3 style=margin-top:8pt>Now: Web Developer at Sound Data Science</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/kavin-nguyen/>Kavin Nguyen</a></h2><h3 style=margin-top:8pt>Now: Operations Automation Engineer, SpaceX</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/yeonjoon-cheong-883498106/>YeonJoon Cheong</a></h2><h3 style=margin-top:8pt>Now: Postdoc</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/josie-sachen-2453b8310/>Josie Sachen</a></h2><h3 style=margin-top:8pt>Now: Research Technician at Seattle Children’s Research Institute</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://github.com/linda189>Linda Nguyen</a></h2></div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/liuyixin-s-322b84250/>Liuyixin Shao</a></h2><h3 style=margin-top:8pt>Now: Peer Mentor at UW Statistics</div></div><div class="col-12 col-sm-auto people-person" style=padding-right:5px;padding-left:5px><div class=portrait-title><h2 style=margin-bottom:0;margin-top:1pt><a href=https://www.linkedin.com/in/varun-krishnakumar-b5691229b/>Varun Krishnakumar</a></h2></div></div></div></div></section><section id=projects class="home-section wg-portfolio"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Projects</h1></div><div class="col-12 col-lg-8"><div class="row js-layout-row"><div class="col-12 isotope-item js-id-education js-id-community-engagement"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/boat/>BOAT: Bridge to Ocean Acoustics and Technology</a></h3><div class=article-style>An open education program for ocean acoustics via executable tutorials</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item js-id-echolocation js-id-passive-acoustic-monitoring js-id-community-engagement"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/ubna-pam/>Passive acoustic monitoring in the Union Bay Natural Area</a></h3><div class=article-style>Using passive acoustic techniques to monitor bats and birds on UW campus!</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3><a href=/project/ubna-pam/><img src=/project/ubna-pam/featured_huc194f52637054b4d7eba4e2df8a5a9ce_539346_150x0_resize_lanczos_2.png alt="Passive acoustic monitoring in the Union Bay Natural Area"></a></div></div></div><div class="col-12 isotope-item js-id-machine-learning js-id-fisheries-acoustics js-id-cloud-computing"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/hake-ml/>Machine learning in fisheries acoustics</a></h3><div class=article-style>Accelerating information extraction from fisheries acoustic data through a cloud-based machine learning workflow.</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3><a href=/project/hake-ml/><img src=/project/hake-ml/featured_huea058eb239bc592c6aa3f76637daf8aa_1069660_150x0_resize_lanczos_2.png alt="Machine learning in fisheries acoustics"></a></div></div></div><div class="col-12 isotope-item js-id-fisheries-acoustics js-id-cloud-computing js-id-open-source js-id-community-engagement"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/echostack/>The open-source "Echostack" for flexible and scalable echosounder data processing</a></h3><div class=article-style>Enhancing the processing capacity and efficiency for echosounder data.</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3><a href=/project/echostack/><img src=/project/echostack/featured_hu19edf9f6119899218f422ce5c30699f5_507576_150x0_resize_lanczos_2.png alt='The open-source "Echostack" for flexible and scalable echosounder data processing'></a></div></div></div><div class="col-12 isotope-item js-id-glider js-id-ADCP js-id-fieldwork js-id-distributed-sensing"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/2020-glider-adcp/>ADCP-equipped underwater glider as a distributed biological sensing tool</a></h3><div class=article-style>Enabling distributed, persistent observation of mid-trophic zooplankton and fish using autonomous underwater gliders equipped with acoustic Doppler current profilers (ADCPs).</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item js-id-machine-learning js-id-OOI js-id-fisheries-acoustics"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/2019-ooi-mtx-decomp/>Pattern discovery from long-term echosounder time series</a></h3><div class=article-style>Developing algorithms to discover prominent spatio-temporal patterns of animal movement and grouping behavior observed in sonar echoes using data from the Ocean Observatories Initiative (OOI).</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item js-id-matlab js-id-open-source js-id-echosounder"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/echo-stat-tutorial/>Echo Statistics</a></h3><div class=article-style>Matlab code to reproduce all figures in an in-depth tutorial on echo statistics.</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3><a href=/project/echo-stat-tutorial/><img src=/project/echo-stat-tutorial/featured_hu2d1e9c949c13616fffcb9f6713bead31_14294409_150x0_resize_lanczos_2.png alt="Echo Statistics"></a></div></div></div><div class="col-12 isotope-item js-id-echolocation js-id-finite-element-modeling"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/echolocation-comsol/>Modeling sound propagation in the head of toothed whales</a></h3><div class=article-style>Understanding the interaction of sound with biological structures in toothed whale head.</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item js-id-echolocation js-id-infotaxis"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/project/echolocation-search/>Target search and discrimination by echolocating toothed whales</a></h3><div class=article-style>Modeling and analyzing the echolocation behavior of toothed whales.</div><div class="stream-meta article-metadata"></div><div class=btn-links></div></div><div class=ml-3></div></div></div></div></div></div></div></section><section id=presentations class="home-section wg-pages"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Presentations</h1></div><div class="col-12 col-lg-8"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/talk/202407-scipy-echostack/>Echostack: An open-source Python software toolbox that democratizes water column sonar dataand processing</a></h3><div class=article-style>Water column sonar data collected by echosounders are essential for marine ecosystem research, allowing the detection, classifi cation, …</div><div class="stream-meta article-metadata"><div><span>Jul 11, 2024 2:20 PM</span>
<span class=middot-divider></span><span>Tacoma, WA</span></div><div><span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span>, <span><a href=/author/valentina-staneva/>Valentina Staneva</a></span>, <span><a href=/author/don-setiawan/>Don Setiawan</a></span>, <span><a href=/author/emilio-mayorga/>Emilio Mayorga</a></span>, <span><a href=/author/caesar-tuguinay/>Caesar Tuguinay</a></span>, <span><a href=/author/soham-kishor-butala/>Soham Kishor Butala</a></span>, <span><a href=/author/brandyn-lucca/>Brandyn Lucca</a></span>, <span><a href=/author/dingrui-lei/>Dingrui Lei</a></span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href="https://www.youtube.com/watch?v=YRFxMGisGww" target=_blank rel=noopener>Video</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/talk/202405-aditya-duty-cycle/>Investigation of duty cycles for measuring activity in passive acoustic bat monitoring</a></h3><div class="stream-meta article-metadata"><div><span>May 14, 2024 10:10 AM</span>
<span class=middot-divider></span><span>Ottawa, Ontario, Canada</span></div><div><span><a href=/author/aditya-krishna/>Aditya Krishna</a></span>, <span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=/talk/202405-aditya-duty-cycle/ASA_20240514_presentation.pdf target=_blank rel=noopener>Slides</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/talk/202405-asa-ottawa-hake/>Variability and influence of fisheries acoustic echogram annotations on machine learning applications</a></h3><div class=article-style>High-frequency echosounders are the workhorse in fisheries and marine ecological surveys. Due to the inherent complexity of biological …</div><div class="stream-meta article-metadata"><div><span>May 13, 2024 12:00 AM</span>
<span class=middot-divider></span><span>Ottawa, ON, Canada</span></div><div><span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span>, <span><a href=/author/valentina-staneva/>Valentina Staneva</a></span>, <span><a href=/author/caesar-tuguinay/>Caesar Tuguinay</a></span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1121/10.0026900 target=_blank rel=noopener>DOI</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/talk/202405-asa-ottawa-school/>Two Pieces of the Same Puzzle: Active and Passive Acoustics for Cross-Trophic Marine Ecosystem Monitoring Part II</a></h3><div class=article-style>In this presentation, I will discuss fundamental concepts of using active acoustic techniques as a remote sensing tool to observe …</div><div class="stream-meta article-metadata"><div><span>May 12, 2024 12:00 AM</span>
<span class=middot-divider></span><span>Ottawa, ON, Canada</span></div><div><span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span></div></div><div class=btn-links></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/talk/202404-wgfast-ship2cloud/>A ship-to-cloud machine learning pipeline built on the open-source Python Echostack software tools</a></h3><div class=article-style>Successful application of machine learning (ML) methodology requires iterative development and testing of not only the models but also …</div><div class="stream-meta article-metadata"><div><span>Apr 11, 2024 9:00 AM</span>
<span class=middot-divider></span><span>Brest, France</span></div><div><span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span>, <span><a href=/author/valentina-staneva/>Valentina Staneva</a></span>, <span><a href=/author/dingrui-lei/>Dingrui Lei</a></span>, <span><a href=/author/zhongqi-miao/>Zhongqi Miao</a></span></div></div><div class=btn-links></div></div><div class=ml-3></div></div><div class=see-all><a href=/talk/>See all presentations
<i class="fas fa-angle-right"></i></a></div></div></div></div></section><section id=publications class="home-section wg-pages"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Publications</h1></div><div class="col-12 col-lg-8"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/publication/2025-krishna-lee-jasa-dutycycle/>Influence of duty-cycle recording on measuring bat activity in passive acoustic monitoring</a></h3><div class=article-style>We performed a systematic investigation into the effects of duty-cycling on measuring activity in the passive acoustic monitoring of echolocating bats.</div><div class="stream-meta article-metadata"><div><span><strong>A Krishna</strong></span>, <span>W-J Lee</span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1121/10.0039108 target=_blank rel=noopener>DOI</a>
<a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1101/2025.04.15.649046 target=_blank rel=noopener>bioRxiv</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/publication/2025-cheong-etal-jasa-hrtf/>Head-related transfer function predictions reveal dominant sound propagation mechanisms to the dolphin ears</a></h3><div class="stream-meta article-metadata"><div><span><strong>Y Cheong</strong></span>, <span>W-J Lee</span>, <span>A Ruesch</span>, <span>MD Schalles</span>, <span>J Kainerstorfer</span>, <span>B Shinn-Cunningham</span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1121/10.0036904 target=_blank rel=noopener>DOI</a>
<a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1101/2025.05.22.655550 target=_blank rel=noopener>bioRxiv</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/publication/2025-lee-etal-jasa-porpoise-movement/>Movement trajectories reflect active information acquisition by an echolocating porpoise in a target discrimination task</a></h3><div class="stream-meta article-metadata"><div><span><strong>W-J Lee</strong></span>, <span>M Ladegaard</span>, <span>MD Schalles</span>, <span>JR Buck</span>, <span>K Beedholm</span>, <span>PT Madsen</span>, <span>PL Tyack</span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1121/10.0037038 target=_blank rel=noopener>DOI</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/publication/2024-lee-etal-echopype/>Interoperable and scalable echosounder data processing with Echopype</a></h3><div class="stream-meta article-metadata"><div><span>W-J Lee</span>, <span>L Setiawan</span>, <span>C Tuguinay</span>, <span>E Mayorga</span>, <span>V Staneva</span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1093/icesjms/fsae133 target=_blank rel=noopener>DOI</a></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/publication/2021-castellote-etal-plosone-beluga-foraging-monitoring/>Beluga whale (Delphinapterus leucas) acoustic foraging behavior and applications for long term monitoring</a></h3><div class="stream-meta article-metadata"><div><span>M Castellote</span>, <span>TA Mooney</span>, <span>R Andrews</span>, <span>S Deruiter</span>, <span>W-J Lee</span>, <span>M Ferguson</span>, <span>P Wade</span></div></div><div class=btn-links><a class="btn btn-outline-primary my-1 mr-1 btn-sm" href=https://doi.org/10.1371/journal.pone.0260485 target=_blank rel=noopener>DOI</a></div></div><div class=ml-3></div></div><div class=see-all><a href=/publication/>See all publications
<i class="fas fa-angle-right"></i></a></div></div></div></div></section><section id=group class="home-section wg-portfolio"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Group misc</h1></div><div class="col-12 col-lg-8"><div class="row js-layout-row"><div class="col-12 isotope-item"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/group/coc/>Code of Conduct & What we value</a></h3><div class=article-style>We review and discuss our code of conduct and what we value regularly, as a reminder and inspiration.</div><div class="stream-meta article-metadata"><div class=article-metadata></div></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/group/compute_docs/>Computing startup resources</a></h3><div class=article-style>Useful starting computing resources</div><div class="stream-meta article-metadata"><div class=article-metadata></div></div></div><div class=ml-3></div></div></div><div class="col-12 isotope-item"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/group/communication/>Communication within group</a></h3><div class=article-style>Our current practice to communicate with each other in Echospace</div><div class="stream-meta article-metadata"><div class=article-metadata></div></div></div><div class=ml-3></div></div></div></div></div></div></div></section><section id=posts class="home-section wg-pages"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Posts</h1></div><div class="col-12 col-lg-8"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/2023/09/18/a-summer-of-refactoring-echoshader/>A Summer of Refactoring Echoshader!</a></h3><div class=article-style>Echospace hosted a contributor - Dingrui Lei, to refactor echoshader - a package for interactive visualization of echosounder data.</div><div class="stream-meta article-metadata"><div class=article-metadata><div><span>Dingrui Lei</span></div><span class=article-date>Sep 18, 2023</span>
<span class=middot-divider></span><span class=article-reading-time>4 min read</span></div></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/2022/07/28/hello-from-dingrui-lei-gsoc-contributor-of-echoshader/>Hello from Dingrui Lei, GSoC contributor of Echoshader!</a></h3><div class=article-style>Echospace hosted a Google Summer of Code (GSoC) contributor to jump start <a href=https://github.com/OSOceanAcoustics/echoshader>echoshader</a>, a new package for interactive visualization of echosounder data.</div><div class="stream-meta article-metadata"><div class=article-metadata><div><span>Dingrui Lei</span>, <span><a href=/author/don-setiawan/>Don Setiawan</a></span></div><span class=article-date>Jul 28, 2022</span>
<span class=middot-divider></span><span class=article-reading-time>4 min read</span></div></div></div><div class=ml-3></div></div></div></div></div></section><section id=positions class="home-section wg-pages"><div class=container><div class=row><div class="col-12 col-lg-4 section-heading"><h1>Positions</h1></div><div class="col-12 col-lg-8"><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/position/2025-03-01-rse/>Scientific Software Engineering Opportunity</a></h3><div class="stream-meta article-metadata"><div class=article-metadata><div><span><a href=/author/wu-jung-lee/>Wu-Jung Lee</a></span>, <span><a href=/author/valentina-staneva/>Valentina Staneva</a></span></div><span class=article-date>Mar 1, 2025</span></div></div></div><div class=ml-3></div></div><div class="media stream-item"><div class=media-body><h3 class="article-title mb-0 mt-0"><a href=/position/opportunities/>Opportunities at Echospace</a></h3><div class=article-style>Interested in joining Echospace? Check out the latest info here!</div><div class="stream-meta article-metadata"><div class=article-metadata><span class=article-date>Sep 1, 2024</span></div></div></div><div class=ml-3></div></div></div></div></div></section><section id=contact class="home-section wg-contact"><div class=container><div class="row contact-widget"><div class="col-12 col-lg-4 section-heading"><h1>Contact</h1></div><div class="col-12 col-lg-8"><ul class=fa-ul><li><i class="fa-li fas fa-envelope fa-2x" aria-hidden=true></i>
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