A modal analysis of acoustic propagation in the changing Arctic environment
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015. Cataloged from PDF version of thesis. Includes bibliographical references (page 59). This work takes an in depth look at acoustic propagation through double duct sound speed profiles in the Arctic. While...
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ftmit:oai:dspace.mit.edu:1721.1/101542 2023-06-11T04:08:09+02:00 A modal analysis of acoustic propagation in the changing Arctic environment Howe, Thomas (Thomas Ryan) Henrik Schmidt. Massachusetts Institute of Technology. Department of Mechanical Engineering. r --- 2015 91 pages application/pdf http://hdl.handle.net/1721.1/101542 eng eng Massachusetts Institute of Technology http://hdl.handle.net/1721.1/101542 940562680 M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Mechanical Engineering Thesis 2015 ftmit 2023-05-29T08:21:57Z Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015. Cataloged from PDF version of thesis. Includes bibliographical references (page 59). This work takes an in depth look at acoustic propagation through double duct sound speed profiles in the Arctic. While the traditional Arctic sound speed profile has a single surface duct, some portions of the Arctic have a sound speed profile which includes a second, lower duct. These double duct systems are seen through out the Beaufort Sea, dating back to 2004, in data made available by the Ice-Tethered Profiler program at the Woods Hole Oceanographic Institutes. The acoustic propagation through the double duct system is analyzed using normal mode analysis, through the Kraken normal mode code. A simulated lower duct is introduced in order to isolate only those modes which travel within the lower duct. Propagation through the lower duct is compared to propagation in traditional Arctic sound speed profiles, and for certain ducts distinct increases in propagation strength are shown. by Thomas Howe. S.M. Thesis Arctic Beaufort Sea DSpace@MIT (Massachusetts Institute of Technology) Arctic Arctic Sound ENVELOPE(-108.852,-108.852,67.534,67.534) Kraken ENVELOPE(14.070,14.070,77.470,77.470) |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
topic |
Mechanical Engineering |
spellingShingle |
Mechanical Engineering Howe, Thomas (Thomas Ryan) A modal analysis of acoustic propagation in the changing Arctic environment |
topic_facet |
Mechanical Engineering |
description |
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015. Cataloged from PDF version of thesis. Includes bibliographical references (page 59). This work takes an in depth look at acoustic propagation through double duct sound speed profiles in the Arctic. While the traditional Arctic sound speed profile has a single surface duct, some portions of the Arctic have a sound speed profile which includes a second, lower duct. These double duct systems are seen through out the Beaufort Sea, dating back to 2004, in data made available by the Ice-Tethered Profiler program at the Woods Hole Oceanographic Institutes. The acoustic propagation through the double duct system is analyzed using normal mode analysis, through the Kraken normal mode code. A simulated lower duct is introduced in order to isolate only those modes which travel within the lower duct. Propagation through the lower duct is compared to propagation in traditional Arctic sound speed profiles, and for certain ducts distinct increases in propagation strength are shown. by Thomas Howe. S.M. |
author2 |
Henrik Schmidt. Massachusetts Institute of Technology. Department of Mechanical Engineering. |
format |
Thesis |
author |
Howe, Thomas (Thomas Ryan) |
author_facet |
Howe, Thomas (Thomas Ryan) |
author_sort |
Howe, Thomas (Thomas Ryan) |
title |
A modal analysis of acoustic propagation in the changing Arctic environment |
title_short |
A modal analysis of acoustic propagation in the changing Arctic environment |
title_full |
A modal analysis of acoustic propagation in the changing Arctic environment |
title_fullStr |
A modal analysis of acoustic propagation in the changing Arctic environment |
title_full_unstemmed |
A modal analysis of acoustic propagation in the changing Arctic environment |
title_sort |
modal analysis of acoustic propagation in the changing arctic environment |
publisher |
Massachusetts Institute of Technology |
publishDate |
2015 |
url |
http://hdl.handle.net/1721.1/101542 |
op_coverage |
r --- |
long_lat |
ENVELOPE(-108.852,-108.852,67.534,67.534) ENVELOPE(14.070,14.070,77.470,77.470) |
geographic |
Arctic Arctic Sound Kraken |
geographic_facet |
Arctic Arctic Sound Kraken |
genre |
Arctic Beaufort Sea |
genre_facet |
Arctic Beaufort Sea |
op_relation |
http://hdl.handle.net/1721.1/101542 940562680 |
op_rights |
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 |
_version_ |
1768381297482268672 |