Passive acoustic localization and tracking using arrays and directional sensors
In bioacoustics, passive acoustic localization and tracking plays an important role in studying marine mammals and other organisms that produce underwater sounds. However, the implementation of such techniques faces many practical challenges, such as lack of environmental data for accurately modelin...
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ftcdlib:oai:escholarship.org:ark:/13030/qt7dx302j2 2024-09-15T18:30:31+00:00 Passive acoustic localization and tracking using arrays and directional sensors Tenorio-Hallé, Ludovic Thode, Aaron M 2021-01-01 application/pdf https://escholarship.org/uc/item/7dx302j2 https://escholarship.org/content/qt7dx302j2/qt7dx302j2.pdf en eng eScholarship, University of California qt7dx302j2 https://escholarship.org/uc/item/7dx302j2 https://escholarship.org/content/qt7dx302j2/qt7dx302j2.pdf public Acoustics Ocean engineering etd 2021 ftcdlib 2024-06-28T06:28:23Z In bioacoustics, passive acoustic localization and tracking plays an important role in studying marine mammals and other organisms that produce underwater sounds. However, the implementation of such techniques faces many practical challenges, such as lack of environmental data for accurately modeling acoustic propagation, uncertainties in sensor position, time-synchronization of autonomous instruments, and logistical constraints due to large arrays. The three research chapters of this dissertation cumulatively address these hurdles.Chapter 2 develops a reformulation of the “double-difference” method for long-range tracking of acoustic sources. Originally developed for high-resolution localization of earthquakes across a network of widely distributed sensor, the double-difference approach is here adapted to exploit acoustic multipath on a vertical array, deployed in a deep-water waveguide. Results are shown to provide high-precision relative depth and range tracks of sources on the order of 50 km away, by compensating for biases caused by underdetermined array tilt and sound speed model. The method is demonstrated on both a towed acoustic source and a sperm whale (Physeter macrocephalus). Chapter 3 presents a passive time-synchronization technique for independent autonomous acoustic recorders. This approach relies on the coherent ambient noise sources maintaining the same statistical angular distribution around the instruments. Under this assumption, the temporal evolution of the cross-correlation function between sensor pairs reveals their relative time drift. This method enables continuous measurements of clock offset, including small-scale non-linear fluctuations of the drift, otherwise unobservable with standard time-synchronization techniques. Data from a field study in San Ignacio Lagoon, Mexico, is used to demonstrate this technique which is here applied to low frequency pulses, most likely originating from croaker fish (Sciaenidae family). Chapter 4 uses acoustic vector sensor data to track multiple ... Thesis Physeter macrocephalus Sperm whale University of California: eScholarship |
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English |
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Acoustics Ocean engineering |
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Acoustics Ocean engineering Tenorio-Hallé, Ludovic Passive acoustic localization and tracking using arrays and directional sensors |
topic_facet |
Acoustics Ocean engineering |
description |
In bioacoustics, passive acoustic localization and tracking plays an important role in studying marine mammals and other organisms that produce underwater sounds. However, the implementation of such techniques faces many practical challenges, such as lack of environmental data for accurately modeling acoustic propagation, uncertainties in sensor position, time-synchronization of autonomous instruments, and logistical constraints due to large arrays. The three research chapters of this dissertation cumulatively address these hurdles.Chapter 2 develops a reformulation of the “double-difference” method for long-range tracking of acoustic sources. Originally developed for high-resolution localization of earthquakes across a network of widely distributed sensor, the double-difference approach is here adapted to exploit acoustic multipath on a vertical array, deployed in a deep-water waveguide. Results are shown to provide high-precision relative depth and range tracks of sources on the order of 50 km away, by compensating for biases caused by underdetermined array tilt and sound speed model. The method is demonstrated on both a towed acoustic source and a sperm whale (Physeter macrocephalus). Chapter 3 presents a passive time-synchronization technique for independent autonomous acoustic recorders. This approach relies on the coherent ambient noise sources maintaining the same statistical angular distribution around the instruments. Under this assumption, the temporal evolution of the cross-correlation function between sensor pairs reveals their relative time drift. This method enables continuous measurements of clock offset, including small-scale non-linear fluctuations of the drift, otherwise unobservable with standard time-synchronization techniques. Data from a field study in San Ignacio Lagoon, Mexico, is used to demonstrate this technique which is here applied to low frequency pulses, most likely originating from croaker fish (Sciaenidae family). Chapter 4 uses acoustic vector sensor data to track multiple ... |
author2 |
Thode, Aaron M |
format |
Thesis |
author |
Tenorio-Hallé, Ludovic |
author_facet |
Tenorio-Hallé, Ludovic |
author_sort |
Tenorio-Hallé, Ludovic |
title |
Passive acoustic localization and tracking using arrays and directional sensors |
title_short |
Passive acoustic localization and tracking using arrays and directional sensors |
title_full |
Passive acoustic localization and tracking using arrays and directional sensors |
title_fullStr |
Passive acoustic localization and tracking using arrays and directional sensors |
title_full_unstemmed |
Passive acoustic localization and tracking using arrays and directional sensors |
title_sort |
passive acoustic localization and tracking using arrays and directional sensors |
publisher |
eScholarship, University of California |
publishDate |
2021 |
url |
https://escholarship.org/uc/item/7dx302j2 https://escholarship.org/content/qt7dx302j2/qt7dx302j2.pdf |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_relation |
qt7dx302j2 https://escholarship.org/uc/item/7dx302j2 https://escholarship.org/content/qt7dx302j2/qt7dx302j2.pdf |
op_rights |
public |
_version_ |
1810471984926031872 |