Naval Postgraduate School
Computation of acoustic normal modes in the ocean using asymptotic expansion methods
computationofaco00pime.pdf (3.858Mb)Abstract
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.
Description
Approved for public release; distribution is unlimited
Collections
Related items
Showing items related by title, author, creator and subject.
-
Acoustical Characterization of the Columbia River Estuary
(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
(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 ... -
Field observation of low-to-mid-frequency acoustic propagation characteristics of an estuarine salt wedge
(2016-01-04);The estuarine environment often hosts a salt wedge, the stratification of which is a function of the tide’s range and speed of advance, river discharge volumetric flow rate, and river mouth morphology. Competing effects ...
