Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data
An approach to acquire geophysical information of seabed sediments as derrved from acoustic attenuation rs described. Using thefrequencies corresponding to the signal power spectrum maximum and a point 3 dB below, signal loss in the sediment is calculated. These results are compared to reference dat...
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NATO. SACLANTCEN
1997
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ftcentremre:oai:cmre.archive.knowledgearc.net:20.500.12489/421 2023-05-15T17:22:07+02:00 Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data Guigné, J. Y. Schwinghamer, P. Litvak, S. 1997 10 p. : ill. digital, PDF file https://hdl.handle.net/20.500.12489/421 English eng NATO. SACLANTCEN 11461 CP-45 http://hdl.handle.net/20.500.12489/421 In: High Frequency Seafloor Acoustics (SACLANTCEN Conference Proceedings CP-45), 1997, pp. 195-204 Seafloor sediments Seafloor characterization High Frequency Acoustics Sound attenuation Papers and Articles Conference Proceedings (CP) 1997 ftcentremre https://doi.org/20.500.12489/421 2022-03-27T09:37:58Z An approach to acquire geophysical information of seabed sediments as derrved from acoustic attenuation rs described. Using thefrequencies corresponding to the signal power spectrum maximum and a point 3 dB below, signal loss in the sediment is calculated. These results are compared to reference data for attenuatzon in sediments published by several authors. Data collected on the Grand Banks of Newfoundland during a controlled trawling experiment was processed using this technique, with results illustrating cbse agreement with the underpinning theory. Calculations offractal dimensions were performed to evaluate levels of roughness in the inner structure of the sediments. Since lower levels of the fractal dimensions represent less of a microfaunal presence [I] only the lower fractal valued data were used in the dynamic attenuation extractions. Hence, the correlations were found to be more rellable and reflectrve of homogeneous sediment structures. Other/Unknown Material Newfoundland CMRE Open Library (NATO STO Centre for Maritime Research and Experimentation |
institution |
Open Polar |
collection |
CMRE Open Library (NATO STO Centre for Maritime Research and Experimentation |
op_collection_id |
ftcentremre |
language |
English |
topic |
Seafloor sediments Seafloor characterization High Frequency Acoustics Sound attenuation |
spellingShingle |
Seafloor sediments Seafloor characterization High Frequency Acoustics Sound attenuation Guigné, J. Y. Schwinghamer, P. Litvak, S. Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
topic_facet |
Seafloor sediments Seafloor characterization High Frequency Acoustics Sound attenuation |
description |
An approach to acquire geophysical information of seabed sediments as derrved from acoustic attenuation rs described. Using thefrequencies corresponding to the signal power spectrum maximum and a point 3 dB below, signal loss in the sediment is calculated. These results are compared to reference data for attenuatzon in sediments published by several authors. Data collected on the Grand Banks of Newfoundland during a controlled trawling experiment was processed using this technique, with results illustrating cbse agreement with the underpinning theory. Calculations offractal dimensions were performed to evaluate levels of roughness in the inner structure of the sediments. Since lower levels of the fractal dimensions represent less of a microfaunal presence [I] only the lower fractal valued data were used in the dynamic attenuation extractions. Hence, the correlations were found to be more rellable and reflectrve of homogeneous sediment structures. |
format |
Other/Unknown Material |
author |
Guigné, J. Y. Schwinghamer, P. Litvak, S. |
author_facet |
Guigné, J. Y. Schwinghamer, P. Litvak, S. |
author_sort |
Guigné, J. Y. |
title |
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
title_short |
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
title_full |
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
title_fullStr |
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
title_full_unstemmed |
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
title_sort |
dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data |
publisher |
NATO. SACLANTCEN |
publishDate |
1997 |
url |
https://hdl.handle.net/20.500.12489/421 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
In: High Frequency Seafloor Acoustics (SACLANTCEN Conference Proceedings CP-45), 1997, pp. 195-204 |
op_relation |
11461 CP-45 http://hdl.handle.net/20.500.12489/421 |
op_doi |
https://doi.org/20.500.12489/421 |
_version_ |
1766108481924890624 |