$Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure$
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Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure

Three-Dimensional (3-D) sound propagation in a shallow-water waveguide with a constant depth and inhomogeneous bottom is studied through numerical simulations. As a model of inhomogeneity, a transitional region between an acoustically soft and hard bottom is considered. Depth-averaged transmission l...

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Autores principales:	Andrey Lunkov, Danila Sidorov, Valery Petnikov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	shallow water acoustics horizontal refraction inhomogeneous bottom Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/2798b56811d14f8fa79335c3ffb4a4b9
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id	oai:doaj.org-article:2798b56811d14f8fa79335c3ffb4a4b9
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spelling	oai:doaj.org-article:2798b56811d14f8fa79335c3ffb4a4b92021-11-25T18:04:55ZHorizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure10.3390/jmse91112692077-1312https://doaj.org/article/2798b56811d14f8fa79335c3ffb4a4b92021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1269https://doaj.org/toc/2077-1312Three-Dimensional (3-D) sound propagation in a shallow-water waveguide with a constant depth and inhomogeneous bottom is studied through numerical simulations. As a model of inhomogeneity, a transitional region between an acoustically soft and hard bottom is considered. Depth-averaged transmission loss simulations using the “horizontal rays and vertical modes” approach and mode parabolic equations demonstrate the horizontal refraction of sound in this region, even if the water column is considered homogeneous. The observed wave effect is prominent at low frequencies, at which the water depth does not exceed a few acoustic wavelengths. The obtained results within the simplified model are verified by the simulations for a real seabed structure in the Kara Sea.Andrey LunkovDanila SidorovValery PetnikovMDPI AGarticleshallow water acousticshorizontal refractioninhomogeneous bottomNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1269, p 1269 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	shallow water acoustics horizontal refraction inhomogeneous bottom Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	shallow water acoustics horizontal refraction inhomogeneous bottom Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Andrey Lunkov Danila Sidorov Valery Petnikov Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
description	Three-Dimensional (3-D) sound propagation in a shallow-water waveguide with a constant depth and inhomogeneous bottom is studied through numerical simulations. As a model of inhomogeneity, a transitional region between an acoustically soft and hard bottom is considered. Depth-averaged transmission loss simulations using the “horizontal rays and vertical modes” approach and mode parabolic equations demonstrate the horizontal refraction of sound in this region, even if the water column is considered homogeneous. The observed wave effect is prominent at low frequencies, at which the water depth does not exceed a few acoustic wavelengths. The obtained results within the simplified model are verified by the simulations for a real seabed structure in the Kara Sea.
format	article
author	Andrey Lunkov Danila Sidorov Valery Petnikov
author_facet	Andrey Lunkov Danila Sidorov Valery Petnikov
author_sort	Andrey Lunkov
title	Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
title_short	Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
title_full	Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
title_fullStr	Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
title_full_unstemmed	Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure
title_sort	horizontal refraction of acoustic waves in shallow-water waveguides due to an inhomogeneous bottom structure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2798b56811d14f8fa79335c3ffb4a4b9
work_keys_str_mv	AT andreylunkov horizontalrefractionofacousticwavesinshallowwaterwaveguidesduetoaninhomogeneousbottomstructure AT danilasidorov horizontalrefractionofacousticwavesinshallowwaterwaveguidesduetoaninhomogeneousbottomstructure AT valerypetnikov horizontalrefractionofacousticwavesinshallowwaterwaveguidesduetoaninhomogeneousbottomstructure
_version_	1718411606979772416

Horizontal Refraction of Acoustic Waves in Shallow-Water Waveguides Due to an Inhomogeneous Bottom Structure

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