國立虎尾科技大學 |

Studies Using Underwater Acoustic Tracking Arrays.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Studies Using Underwater Acoustic Tracking Arrays./
Author:	Snyder, Eric R.
Description:	1 online resource (100 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
Contained By:	Dissertations Abstracts International85-10B.
Subject:	Acoustics. -
Online resource:	click for full text (PQDT)
ISBN:	9798382302409

Studies Using Underwater Acoustic Tracking Arrays.
Snyder, Eric R.

Studies Using Underwater Acoustic Tracking Arrays. - 1 online resource (100 pages)

Source: Dissertations Abstracts International, Volume: 85-10, Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2024.

Includes bibliographical references

The oceans contain a cacophony of sounds from biological, geological, meteorological, and anthropogenic sources. As computational power and data storage capabilities have increased, long-term passive acoustic recordings have been increasingly employed to study the oceans. Multiple hydrophones can be deployed in a site or region to gain more information on the spatial properties of acoustic soundscapes. In this thesis, we use hydrophone arrays to track vocalizing animals and anthropogenic sound sources, and by so doing gain valuable insights into ocean environments.Chapter 1 introduces Where's Whaledo: software toolkit and workflow for efficiently and reliably localizing and tracking groups of vocalizing animals. Methods were developed to identify and remove false detections in small-aperture direction of arrival estimates, associate detections across widely-spaced instruments using click trains, estimate source locations, and calculate confidence intervals.Chapter 2 employs Where's Whaledo on Ziphius cavirostris (Zc) in the Tanner Basin, demonstrating the toolkit's capabilities by reconstructing the tracks of 143 dives. The localized animals demonstrated a preference for the steeper bathymetry at the study site, as well as a possible preference for swimming in groups of two or more animals. 12 of these tracks were used to estimate the beam pattern of a Zc echolocation click.Chapter 3 demonstrates the challenges and complexities of long-range propagation by examining recordings of five vessels performing a coordinated seismic survey using high-intensity signals from airgun arrays. Using several identifiable patterns in the acoustic data, each arrival in a 110-minute period was associated with its source vessel so changes in dispersion patterns could be observed over time. Both ray trace and parabolic equation models were used to simulate dispersion patterns. Potential causes of differences between the modeled signals and the observed signals are discussed, and recommendations are made for future analyses.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798382302409Subjects--Topical Terms:

670692
Acoustics.
Subjects--Index Terms:

Ocean acousticsIndex Terms--Genre/Form:

554714
Electronic books.

Studies Using Underwater Acoustic Tracking Arrays.
LDR:03378ntm a22003857 4500 001 1150326
005 20241028114747.5
006 m o d
007 cr bn ---uuuuu
008 250605s2024 xx obm 000 0 eng d
020 $a 9798382302409
035 $a (MiAaPQ)AAI30994450
035 $a AAI30994450
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Snyder, Eric R. $3 1476789
245 1 0 $a Studies Using Underwater Acoustic Tracking Arrays.
264 0 $c 2024
300 $a 1 online resource (100 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
500 $a Advisor: Hildebrand, John A.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2024.
504 $a Includes bibliographical references
520 $a The oceans contain a cacophony of sounds from biological, geological, meteorological, and anthropogenic sources. As computational power and data storage capabilities have increased, long-term passive acoustic recordings have been increasingly employed to study the oceans. Multiple hydrophones can be deployed in a site or region to gain more information on the spatial properties of acoustic soundscapes. In this thesis, we use hydrophone arrays to track vocalizing animals and anthropogenic sound sources, and by so doing gain valuable insights into ocean environments.Chapter 1 introduces Where's Whaledo: software toolkit and workflow for efficiently and reliably localizing and tracking groups of vocalizing animals. Methods were developed to identify and remove false detections in small-aperture direction of arrival estimates, associate detections across widely-spaced instruments using click trains, estimate source locations, and calculate confidence intervals.Chapter 2 employs Where's Whaledo on Ziphius cavirostris (Zc) in the Tanner Basin, demonstrating the toolkit's capabilities by reconstructing the tracks of 143 dives. The localized animals demonstrated a preference for the steeper bathymetry at the study site, as well as a possible preference for swimming in groups of two or more animals. 12 of these tracks were used to estimate the beam pattern of a Zc echolocation click.Chapter 3 demonstrates the challenges and complexities of long-range propagation by examining recordings of five vessels performing a coordinated seismic survey using high-intensity signals from airgun arrays. Using several identifiable patterns in the acoustic data, each arrival in a 110-minute period was associated with its source vessel so changes in dispersion patterns could be observed over time. Both ray trace and parabolic equation models were used to simulate dispersion patterns. Potential causes of differences between the modeled signals and the observed signals are discussed, and recommendations are made for future analyses.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Acoustics. $3 670692
650 4 $a Ocean engineering. $3 857658
650 4 $a Biological oceanography. $3 1178855
653 $a Ocean acoustics
653 $a Passive acoustic recordings
653 $a Ziphius cavirostris
653 $a Underwater
655 7 $a Electronic books. $2 local $3 554714
690 $a 0986
690 $a 0547
690 $a 0416
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, San Diego. $b Scripps Institution of Oceanography. $3 1465104
773 0 $t Dissertations Abstracts International $g 85-10B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30994450 $z click for full text (PQDT)