Shallow Water Reverberation Measurement and Prediction
Low frequency active sonar performance in shallow water is often limited by reverberation. Reverberation modeling in shallow water has been difficult due to the complexity of the multipath acoustic propagation problem inherent in shallow environments. In August 1992, a shallow water, low-frequency r...
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ftdtic:ADA283498 2023-05-15T15:38:26+02:00 Shallow Water Reverberation Measurement and Prediction Muggleworth, Charles E. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 1994-06 text/html http://www.dtic.mil/docs/citations/ADA283498 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA283498 en eng http://www.dtic.mil/docs/citations/ADA283498 Approved for public release; distribution is unlimited. DTIC AND NTIS Acoustics *SHALLOW WATER *REVERBERATION *UNDERWATER ACOUSTICS SIGNAL PROCESSING MEASUREMENT MODELS PROCESSING BROADBAND SOUND TRANSMISSION HYDROPHONES OCEANS LOW FREQUENCIES OMNIDIRECTIONAL NOISE(SOUND) NARROWBAND UNDERWATER SOUND SONAR OCEAN ENVIRONMENTS BARENTS SEA RAY TRACING IMPULSE NOISE STATISTICAL ANALYSIS ACOUSTIC ARRAYS THEORY THESES BACKSCATTERING EXPLOSIVES HARPO PROGRAM Text 1994 ftdtic 2016-02-22T02:42:42Z Low frequency active sonar performance in shallow water is often limited by reverberation. Reverberation modeling in shallow water has been difficult due to the complexity of the multipath acoustic propagation problem inherent in shallow environments. In August 1992, a shallow water, low-frequency reverberation measurement was made in the Barents Sea utilizing explosive signal, underwater sound (SUS) charges as sound sources and a 16-element vertical hydrophone array as the receiver. The objectives of this thesis were to analyze the reverberation data from this experiment, compare several theories which have been proposed to model reverberation, and determine the reverberant characteristics of the region. The three-dimensional Hamiltonian Acoustic Ray- tracing Program for the Ocean (HARPO) was used as the primary propagation modeling tool. The temporal signal processing consisted of a short-time Fourier transform spectral estimation method applied to data from a single hydrophone. Chapman's source spectrum model was used. Reverberation models based on Lambert's law and omnidirectional backscattering theory were compared. Lambert's law was found to be more applicable in the Barents Sea. A statistical analysis was performed on broadband and narrowband hydrophone data showing that reverberation in the Barents Sea possesses Gaussian properties. Text Barents Sea Defense Technical Information Center: DTIC Technical Reports database Barents Sea |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Acoustics *SHALLOW WATER *REVERBERATION *UNDERWATER ACOUSTICS SIGNAL PROCESSING MEASUREMENT MODELS PROCESSING BROADBAND SOUND TRANSMISSION HYDROPHONES OCEANS LOW FREQUENCIES OMNIDIRECTIONAL NOISE(SOUND) NARROWBAND UNDERWATER SOUND SONAR OCEAN ENVIRONMENTS BARENTS SEA RAY TRACING IMPULSE NOISE STATISTICAL ANALYSIS ACOUSTIC ARRAYS THEORY THESES BACKSCATTERING EXPLOSIVES HARPO PROGRAM |
spellingShingle |
Acoustics *SHALLOW WATER *REVERBERATION *UNDERWATER ACOUSTICS SIGNAL PROCESSING MEASUREMENT MODELS PROCESSING BROADBAND SOUND TRANSMISSION HYDROPHONES OCEANS LOW FREQUENCIES OMNIDIRECTIONAL NOISE(SOUND) NARROWBAND UNDERWATER SOUND SONAR OCEAN ENVIRONMENTS BARENTS SEA RAY TRACING IMPULSE NOISE STATISTICAL ANALYSIS ACOUSTIC ARRAYS THEORY THESES BACKSCATTERING EXPLOSIVES HARPO PROGRAM Muggleworth, Charles E. Shallow Water Reverberation Measurement and Prediction |
topic_facet |
Acoustics *SHALLOW WATER *REVERBERATION *UNDERWATER ACOUSTICS SIGNAL PROCESSING MEASUREMENT MODELS PROCESSING BROADBAND SOUND TRANSMISSION HYDROPHONES OCEANS LOW FREQUENCIES OMNIDIRECTIONAL NOISE(SOUND) NARROWBAND UNDERWATER SOUND SONAR OCEAN ENVIRONMENTS BARENTS SEA RAY TRACING IMPULSE NOISE STATISTICAL ANALYSIS ACOUSTIC ARRAYS THEORY THESES BACKSCATTERING EXPLOSIVES HARPO PROGRAM |
description |
Low frequency active sonar performance in shallow water is often limited by reverberation. Reverberation modeling in shallow water has been difficult due to the complexity of the multipath acoustic propagation problem inherent in shallow environments. In August 1992, a shallow water, low-frequency reverberation measurement was made in the Barents Sea utilizing explosive signal, underwater sound (SUS) charges as sound sources and a 16-element vertical hydrophone array as the receiver. The objectives of this thesis were to analyze the reverberation data from this experiment, compare several theories which have been proposed to model reverberation, and determine the reverberant characteristics of the region. The three-dimensional Hamiltonian Acoustic Ray- tracing Program for the Ocean (HARPO) was used as the primary propagation modeling tool. The temporal signal processing consisted of a short-time Fourier transform spectral estimation method applied to data from a single hydrophone. Chapman's source spectrum model was used. Reverberation models based on Lambert's law and omnidirectional backscattering theory were compared. Lambert's law was found to be more applicable in the Barents Sea. A statistical analysis was performed on broadband and narrowband hydrophone data showing that reverberation in the Barents Sea possesses Gaussian properties. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Muggleworth, Charles E. |
author_facet |
Muggleworth, Charles E. |
author_sort |
Muggleworth, Charles E. |
title |
Shallow Water Reverberation Measurement and Prediction |
title_short |
Shallow Water Reverberation Measurement and Prediction |
title_full |
Shallow Water Reverberation Measurement and Prediction |
title_fullStr |
Shallow Water Reverberation Measurement and Prediction |
title_full_unstemmed |
Shallow Water Reverberation Measurement and Prediction |
title_sort |
shallow water reverberation measurement and prediction |
publishDate |
1994 |
url |
http://www.dtic.mil/docs/citations/ADA283498 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA283498 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA283498 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766369349105352704 |