Download or read book Proceedings of the 2003 Workshop on Detection and Localisation of Marine Mammals Using Passive Acoustics Dartmouth Nova Scotia 19 21 Novembrer 2003 written by Francine Desharnais and published by . This book was released on 2004 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 2003 workshop on detection and localisation of marine mammals using passive acoustics written by Workshop on Detection and Localisation of Marine Mammals Using Passive Acoustics and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection Classification Localization of Marine Mammals Using Passive Acoustics written by Olivier Adam and published by . This book was released on 2013 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 3rd International Workshop on Detection and Classification of Marine Mammals Using Passive Acoustics written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 4th International Workshop on Detection Classification and Localization of Marine Mammals Using Passive Acoustics and 1st International Workshop on Density Estimation of Marine Mammals Using Passive Acoustics written by International Workshop on Detection, Classification and Localization of Marine Mammals Using Passive Acoustics and published by . This book was released on 2010 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection and Localization of Marine Mammals Using Passive Acoustics written by Olivier Adam and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North Atlantic Right Whale Eubalaena Glacialis Detection Localization in the Bay of Fundy Using Widely Spaced Bottom Mounted Sensors written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A data set consisting of North Atlantic right whale (Eubalaena glacialis) vocalizations were provided as part of the 2003 International Workshop on Detection and Localization of Marine Mammals using Passive Acoustics in Halifax, Nova Scotia. These vocalizations were processed using a set of detection and localization algorithms developed as part of the Marine Mammal Monitoring on Navy Ranges (M3R) program. Localization is performed using hyperbolic multilateration on Time Difference of Arrival (TDOA) data from a two stage FFT based energy detector. Binary FFTs are computed from the raw time series by thresholding the FFT using a time average in each bin as the threshold criteria. Clicks are detected by comparing the total number of bins above threshold to a secondary threshold. Detected clicks are split out of the data stream and the rest of the data is aligned using a spectrogram cross-correlation. Details of the marine mammal monitoring algorithms will be presented as well as results from the data set.).
Download or read book Passive Acoustic Detection of Marine Mammals written by D.A. Abraham and published by . This book was released on 2000 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Passive Acoustic Monitoring for the Detection and Identification of Marine Mammals written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project is intended to advance the state of passive acoustic monitoring. Improved methods of identifying cetaceans are developed in order to contribute to the Navy's mitigation efforts.
Download or read book Marine Mammal Observer and Passive Acoustic Monitoring Handbook written by Victoria Todd and published by Pelagic Publishing Ltd. This book was released on 2015-03-18 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Mammal Observer and Passive Acoustic Monitoring Handbook is the ultimate instruction manual for mitigation measures to minimise man-made acoustical and physical disturbances to marine mammals from industrial and defence activities.
Download or read book Tracking Marine Mammals Using Passive Acoustics written by Eva-Marie Nosal and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammal Observer and Passive Acoustic Monitoring Handbook written by Victoria L. G. Todd and published by . This book was released on 2015 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Mammal Observer and Passive Acoustic Monitoring Handbook is the ultimate instruction manual for mitigation measures to minimise man-made acoustical and physical disturbances to marine mammals from industrial and defence activities. Based on more than two decades of offshore experience, and a decade of supplying MMO and PAM services (commercial and scientific), the Handbook is a long-overdue reference guide that seeks to improve standards worldwide for marine operations such as seismic and drilling exploration, wind farm and civil engineering piling, dredging, trenching, rock-dumping, hydrographical surveys, and military/defence exercises. By popular request, this manual will also form an accompaniment to MMO and PAM courses. The Handbook consolidates all aspects of this discipline into one easily accessible resource, to educate all stakeholders (e.g. MMOs, PAM operators, suppliers, recruitment agencies, clients, contractors, regulators, NGOs, consultants, scientists, academia and media), regardless of experience. Topics include worldwide legislation, compliance, anthropogenic noise sources and potential effects, training, offshore life, visual and acoustic monitoring (theory and practice), marine mammal distribution, hearing and vocalisations, and report writing. Advice is provided on implementing sensible and practical mitigation techniques, appropriate technologies, data collection, client and regulator liaison, and project kick-off meetings. "The Handbook is an indispensable How To guide to the growing and increasingly important occupation of marine mammal monitoring, written with clarity and humor by scientists who have extensive experience in this field." --Dr Phillip J. Clapham, world-renowned cetologist and Director of the Cetacean Assessment and Ecology Program at the National Marine Mammal Laboratory in Seattle.
Download or read book Passive Acoustic Monitoring of Arctic Cetaceans written by Joshua M. Jones and published by . This book was released on 2021 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arctic marine mammal habitats are changing rapidly while marine shipping is increasing in some areas of the Arctic. Passive acoustic monitoring can increase understanding of Arctic marine mammal responses to change and to stressors, like ship traffic. The strength of inference from underwater sound recordings is limited by several factors that I address in this dissertation with the aim of improving the usefulness of acoustic monitoring findings for Arctic marine resource management. I provide spatial context for acoustic detections of bowhead whale sounds, enabling direct comparisons of acoustic presence across different locations and environmental conditions. Ice cover and noise substantially reduce the predicted listening area around underwater sound recorders. Spatially normalized acoustic detections reveal that bowhead whales utilize an area at least 140 km north of Alaska during their spring migration, migrating through large areas of >90% sea ice cover. I describe acoustic characteristics of beluga and narwhal echolocation clicks, which differ substantially in frequency content and rhythmic patterns. Sound absorption by seawater and apparent changes in animal orientation strongly affect frequency spectra of recorded clicks. Finally, I measure the underwater soundscape within a narwhal summer habitat and quantify underwater noise added by commercial ship traffic. The natural soundscape, excluding periods with nearby ships, is relatively quiet in an acoustically sheltered fiord. Distant sounds from regional shipping are apparent at a less-sheltered location open to long-range sound propagation. When ships pass the recording locations, sound levels are elevated above the median levels of natural sounds for periods ranging from 30 minutes up to >4 hours with each transit. Icebreaker and tanker ships radiate more underwater noise than general cargo and bulk carrier ships. Ship sounds overlap with common social sounds produced by narwhals and ringed seals at distances of 5 to >30 km from passing ships, possibly interfering with animal communication. Improved detection distance estimates and understanding of detection probability estimation coupled with increased confidence in detection and identification of beluga, narwhal, and bowhead sounds will facilitate passive acoustic density estimation of Arctic marine mammals, investigation of their relationships with habitat, and studies of their behavioral responses to ship traffic.
Download or read book Detection classification and localisation of marine mammal vocalisations written by S. P. Beerens and published by . This book was released on 2004 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammal Detection Call Up Against the Noise Monitoring Standing Offer written by Brad Glessing and published by . This book was released on 2006 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the work done to prototype a marine mammal detection system. The resulting system will support environmental mitigation measures prior to, and during, active sonar trials and exercises. A working application was delivered at the end of the call-up that allows a user to configure and run detection processing, with live updates provided, or to post-analyze data from a previous detection run. Once selected, an image of the detection and the corresponding detection log entries are presented to the user. The user can also listen to the detection and bring up a time series plot of the raw data. A cursor can be used to measure times and frequencies on the detection image. This system was used to process 30 minutes of Right whale data collected using sonobuoys. Desharnais collected this data set in the Bay of Fundy during the summer of 1999. This data set included dead channels, considerable radio frequency (RF) interference and a digital data channel. Fifty-seven valid detections were made while the sixteen false alarms that did occur were easily classified and rejected. No analysis of missed contact was made. After a quick look at the data, it took an acoustic operator less than a second to distinguish a valid call from a false alarm as he scrolled through the results. Aural listening helped to quickly distinguish valid vs. invalid contacts. There is still considerable room for improvement in the automatic classification and graphical user interface (GUI) layout but, as a prototype, it demonstrates that good detections can be made and classified using a system such as this. The processing stream is based primarily on existing signal processing library (SPLIB) and sonar library (SONLIB) modules developed under previous call-ups. The GUI was based on existing QT-based widgets developed under the Omni Passive Display (OPD) call-up.
Download or read book Marine Mammal Species Detection and Classification written by Nicole Nichols and published by . This book was released on 2016 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transient source detection and classification is a particularly challenging problem. Marine mammal vocalizations are a well-known example of these non-stationary sources, including a variety of clicks, pulse bursts and frequency sweeps. There are both environmental and legal needs to improve remote marine mammal monitoring, which can be done efficiently using passive acoustic monitoring (PAM), and public data are available to test new methods. In this thesis, I propose the use of non-negative matrix factorization (NMF) based feature representation for detection and classification of marine mammals for the following reasons: NMF can learn non-stationary signals, training requires less detailed annotations than existing species classification techniques, it can capture species-specific information from non-stereotyped vocalizations, and some NMF-based methodologies incorporate noise removal and session effect compensation. In particular, co-occurrence constraints in NMF analysis were helpful in addressing session effects in species classification. An additional direction of the research was to minimize the need for strictly labeled training data, which is arduous to create and thereby limits performance. I investigated weakly supervised learning techniques to leverage data with incomplete annotations. In these trials, recordings were made in the visual presence of a single species, but there were no annotations to indicate when vocalizations occurred. Automated detection algorithms identified potential vocalizations and then confidence-based selection methods filtered the best examples in an iterative training procedure. This method was particularly beneficial for species classification from clicks, which is very sensitive to on- and off-axis variations. Changes in orientation make the signal more variable and interfere with establishing consistent features for species classification. Weakly supervised species classification from clicks automatically identified the clicks that were most representative of species. This method improved species classification by 7-15% as compared to models built with all detected clicks. Weak supervision for updating noise bases also lead to a 30% reduction in cross species error for a mismatched data scenario in species classification based on whistles. Together these methods contributed to algorithm improvements for transient source detection and classification system. Further experiments in marine mammal identification using NMF would provide further understanding of methods for compensating for variability associated with recording conditions.
Download or read book Real time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
