A modal analysis of acoustic propagation in the changing Arctic environment
Name
940562680-MIT.pdf
Description
Full printable version
Size
6.7 MB
Format
Adobe PDF
Checksum (MD5)
d87f6c9bee06caa3e4b834f08720340e
Author(s)
Howe, Thomas (Thomas Ryan)
Advisor(s)
Henrik Schmidt.
Date Issued
2015
Publisher
Massachusetts Institute of Technology
Abstract
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.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 59).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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