The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments

Attenuation from fish can reduce the intensity of acoustic signals and significantly decrease detection range for long-range passive sensing of manmade vehicles, geophysical phenomena, and vocalizing marine life. The effect of attenuation from herring shoals on the Passive Ocean Acoustic Waveguide R...

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Autores principales:	Daniel Duane, Chenyang Zhu, Felix Piavsky, Olav Rune Godø, Nicholas C. Makris
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	acoustic remote sensing Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) attenuation ship noise ship tonal Science Q
Acceso en línea:	https://doaj.org/article/7967c2e0f1a64343aec6a1e8d4484a9f
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spelling	oai:doaj.org-article:7967c2e0f1a64343aec6a1e8d4484a9f2021-11-11T18:54:51ZThe Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments10.3390/rs132143692072-4292https://doaj.org/article/7967c2e0f1a64343aec6a1e8d4484a9f2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4369https://doaj.org/toc/2072-4292Attenuation from fish can reduce the intensity of acoustic signals and significantly decrease detection range for long-range passive sensing of manmade vehicles, geophysical phenomena, and vocalizing marine life. The effect of attenuation from herring shoals on the Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) of surface vessels is investigated here, where concurrent wide-area active Ocean Acoustic Waveguide Remote Sensing (OAWRS) is used to confirm that herring shoals occluding the propagation path are responsible for measured reductions in ship radiated sound and corresponding detection losses. Reductions in the intensity of ship-radiated sound are predicted using a formulation for acoustic attenuation through inhomogeneities in an ocean waveguide that has been previously shown to be consistent with experimental measurements of attenuation from fish in active OAWRS transmissions. The predictions of the waveguide attenuation formulation are in agreement with measured reductions from attenuation, where the position, size, and population density of the fish groups are characterized using OAWRS imagery as well as in situ echosounder measurements of the specific shoals occluding the propagation path. Experimental measurements of attenuation presented here confirm previous theoretical predictions that common heuristic formulations employing free space scattering assumptions can be in significant error. Waveguide scattering and propagation theory is found to be necessary for accurate predictions.Daniel DuaneChenyang ZhuFelix PiavskyOlav Rune GodøNicholas C. MakrisMDPI AGarticleacoustic remote sensingPassive Ocean Acoustic Waveguide Remote Sensing (POAWRS)attenuationship noiseship tonalScienceQENRemote Sensing, Vol 13, Iss 4369, p 4369 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acoustic remote sensing Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) attenuation ship noise ship tonal Science Q
spellingShingle	acoustic remote sensing Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) attenuation ship noise ship tonal Science Q Daniel Duane Chenyang Zhu Felix Piavsky Olav Rune Godø Nicholas C. Makris The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
description	Attenuation from fish can reduce the intensity of acoustic signals and significantly decrease detection range for long-range passive sensing of manmade vehicles, geophysical phenomena, and vocalizing marine life. The effect of attenuation from herring shoals on the Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) of surface vessels is investigated here, where concurrent wide-area active Ocean Acoustic Waveguide Remote Sensing (OAWRS) is used to confirm that herring shoals occluding the propagation path are responsible for measured reductions in ship radiated sound and corresponding detection losses. Reductions in the intensity of ship-radiated sound are predicted using a formulation for acoustic attenuation through inhomogeneities in an ocean waveguide that has been previously shown to be consistent with experimental measurements of attenuation from fish in active OAWRS transmissions. The predictions of the waveguide attenuation formulation are in agreement with measured reductions from attenuation, where the position, size, and population density of the fish groups are characterized using OAWRS imagery as well as in situ echosounder measurements of the specific shoals occluding the propagation path. Experimental measurements of attenuation presented here confirm previous theoretical predictions that common heuristic formulations employing free space scattering assumptions can be in significant error. Waveguide scattering and propagation theory is found to be necessary for accurate predictions.
format	article
author	Daniel Duane Chenyang Zhu Felix Piavsky Olav Rune Godø Nicholas C. Makris
author_facet	Daniel Duane Chenyang Zhu Felix Piavsky Olav Rune Godø Nicholas C. Makris
author_sort	Daniel Duane
title	The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
title_short	The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
title_full	The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
title_fullStr	The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
title_full_unstemmed	The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments
title_sort	effect of attenuation from fish on passive detection of sound sources in ocean waveguide environments
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7967c2e0f1a64343aec6a1e8d4484a9f
work_keys_str_mv	AT danielduane theeffectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT chenyangzhu theeffectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT felixpiavsky theeffectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT olavrunegodø theeffectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT nicholascmakris theeffectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT danielduane effectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT chenyangzhu effectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT felixpiavsky effectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT olavrunegodø effectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments AT nicholascmakris effectofattenuationfromfishonpassivedetectionofsoundsourcesinoceanwaveguideenvironments
_version_	1718431653500551168

The Effect of Attenuation from Fish on Passive Detection of Sound Sources in Ocean Waveguide Environments

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