Computation of acoustic normal modes in the ocean using asymptotic expansion methods

Download
Author
Pimentel, Fernando M.M.
Date
1991-09Advisor
Chiu, Ching-Sang
Second Reader
Ehret, Laura L.
Metadata
Show full item recordAbstract
In the thesis, the use of Wentzel-Kramers-Brillouin (WKB) Theory to obtain the solution to the Helmholtz Equation governing the acoustic normal modes is examined. Specifically, uniformly valid WKB solutions for four classes of acoustic normal modes in the ocean are derived and the accuracy of the WKB approximation is tested against some exact solutions. It is found that this inherently high frequency technique has an appreciable accuracy even at a frequency of 1Hz. A product of this thesis is a computer program that solves for the WKB modes for arbitrary sound speed profile.
Rights
Copyright is reserved by the copyright ownerCollections
Related items
Showing items related by title, author, creator and subject.
-
Acoustical Characterization of the Columbia River Estuary
Reeder, D.B. (2014);Investigations of near-shore and in-shore environments have, rightly, focused on geological, thermodynamic and hydrodynamic parameters. A complementary acoustical characterization of the estuarine environment provides ... -
Simulation of the acoustic pulse expected from the interaction of ultra-high energy neutrinos and seawater
Gruell, Michael S. (Monterey, California. Naval Postgraduate School, 2006-03);The purpose of this thesis was to design, build, and test a device capable of simulating the acoustic pulse expected from the interaction between an Ultra-High Energy (UHE) neutrino and seawater. When a neutrino interacts ... -
MEMS acoustic directional finder for small flying UAS [video]
Alves, Fabio; Karunasiri, Gamani (2018-04-18);When compared with the electromagnetic counterparts, acoustic sensors have many advantages that include non-line-of-sight, passive, low-cost, and low power, weight, and size. Acoustic sensors are the primary sensors employed ...