The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay
The Fast Field Program (FFP) was developed to provide rapid, accurate, propagation-loss predictions for a generalized environmental model. This report demonstrates the utility of the FFP, in a different capacity, as a research tool to investigate the sound attenuation in a water column. Hudson Bay w...
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ftdtic:AD0743065 2023-05-15T16:35:14+02:00 The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay DiNapoli, Frederick R. Powers, Mary R. NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI 1972-04-19 text/html http://www.dtic.mil/docs/citations/AD0743065 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0743065 en eng http://www.dtic.mil/docs/citations/AD0743065 Approved for public release; distribution is unlimited. DTIC AND NTIS Acoustics *SOUND TRANSMISSION *UNDERWATER SOUND VELOCITY MATHEMATICAL MODELS ANOMALIES OCEAN BOTTOM UNDERWATER SOUND SIGNALS HUDSON BAY ACOUSTIC PROPERTIES LOW FREQUENCY ATTENUATION SHALLOW WATER MATHEMATICAL PREDICTION *UNDERWATER SOUND TRANSMISSION VELA UNIFORM MOST PROJECT-2 Text 1972 ftdtic 2016-02-22T10:22:48Z The Fast Field Program (FFP) was developed to provide rapid, accurate, propagation-loss predictions for a generalized environmental model. This report demonstrates the utility of the FFP, in a different capacity, as a research tool to investigate the sound attenuation in a water column. Hudson Bay was selected as the area of application because the results of propagation experiments conducted there during August 1970 were available and interesting. The experimentally determined values of the attenuation coefficient for the frequency band 315 to 1600 Hz were found to exceed the values that would be predicted from existing formulas based on empirical relationships. The possibility that this anomalous behavior could have been due to energy leakage into the bottom is examined, and the values of the attenuation coefficient determined from the FFP analysis are compared with experimental results. Text Hudson Bay Defense Technical Information Center: DTIC Technical Reports database Hudson Hudson Bay |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Acoustics *SOUND TRANSMISSION *UNDERWATER SOUND VELOCITY MATHEMATICAL MODELS ANOMALIES OCEAN BOTTOM UNDERWATER SOUND SIGNALS HUDSON BAY ACOUSTIC PROPERTIES LOW FREQUENCY ATTENUATION SHALLOW WATER MATHEMATICAL PREDICTION *UNDERWATER SOUND TRANSMISSION VELA UNIFORM MOST PROJECT-2 |
spellingShingle |
Acoustics *SOUND TRANSMISSION *UNDERWATER SOUND VELOCITY MATHEMATICAL MODELS ANOMALIES OCEAN BOTTOM UNDERWATER SOUND SIGNALS HUDSON BAY ACOUSTIC PROPERTIES LOW FREQUENCY ATTENUATION SHALLOW WATER MATHEMATICAL PREDICTION *UNDERWATER SOUND TRANSMISSION VELA UNIFORM MOST PROJECT-2 DiNapoli, Frederick R. Powers, Mary R. The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
topic_facet |
Acoustics *SOUND TRANSMISSION *UNDERWATER SOUND VELOCITY MATHEMATICAL MODELS ANOMALIES OCEAN BOTTOM UNDERWATER SOUND SIGNALS HUDSON BAY ACOUSTIC PROPERTIES LOW FREQUENCY ATTENUATION SHALLOW WATER MATHEMATICAL PREDICTION *UNDERWATER SOUND TRANSMISSION VELA UNIFORM MOST PROJECT-2 |
description |
The Fast Field Program (FFP) was developed to provide rapid, accurate, propagation-loss predictions for a generalized environmental model. This report demonstrates the utility of the FFP, in a different capacity, as a research tool to investigate the sound attenuation in a water column. Hudson Bay was selected as the area of application because the results of propagation experiments conducted there during August 1970 were available and interesting. The experimentally determined values of the attenuation coefficient for the frequency band 315 to 1600 Hz were found to exceed the values that would be predicted from existing formulas based on empirical relationships. The possibility that this anomalous behavior could have been due to energy leakage into the bottom is examined, and the values of the attenuation coefficient determined from the FFP analysis are compared with experimental results. |
author2 |
NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI |
format |
Text |
author |
DiNapoli, Frederick R. Powers, Mary R. |
author_facet |
DiNapoli, Frederick R. Powers, Mary R. |
author_sort |
DiNapoli, Frederick R. |
title |
The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
title_short |
The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
title_full |
The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
title_fullStr |
The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
title_full_unstemmed |
The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay |
title_sort |
fast field program (ffp) and attenuation loss in hudson bay |
publishDate |
1972 |
url |
http://www.dtic.mil/docs/citations/AD0743065 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0743065 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0743065 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766025435435499520 |