Environmental influence on shallow water bottom reverberation
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Authors
Lee, Boon Chuan.
Subjects
Shallow water reverberation
Reverberation pressure levels
Coherence
Peak vertical correlations
Power spectral density
Power ratio spectral density
MMPE
Reverberation pressure levels
Coherence
Peak vertical correlations
Power spectral density
Power ratio spectral density
MMPE
Advisors
Smith, Kevin B.
Date of Issue
2002-03
Date
March 2002
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
In this work, the influences of various environmental scenarios on the bottom interface and volume reverberation in shallow water were numerically analyzed. Based on similar modeling reverberation geometry defined in previous works, the numerical analyses were conducted for broadband pulse signals to generate complex reverberation structures in the timedomain. The reverberation model used is based on the well-documented Parabolic Equation (PE) approximation. The environmental scenarios are divided into three main categories. They include different sound speed profiles, different levels of bottom interface roughness and different bottom volume fluctuations. While one category is being analyzed, the other two are held constant. The various analyses include broadband two-way reverberation levels comparisons, vertical correlation analysis and power spectral analysis.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics Academic Committee
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
xiv, 53 p. : col. ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner