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dc.contributor.authorParsons, Miles
dc.contributor.authorDuncan, Alexander
dc.contributor.editorDavid J Mee
dc.contributor.editorIan D M Hillock
dc.date.accessioned2017-01-30T12:39:59Z
dc.date.available2017-01-30T12:39:59Z
dc.date.created2012-03-27T20:01:13Z
dc.date.issued2011
dc.identifier.citationParsons, Miles J.G. and Duncan, Alec J. 2011. The effect of seabed properties on the receive beam pattern of a hydrophone located on the seafloor. Acoustics Australia. 39 (3): pp. 106-112.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/23932
dc.description.abstract

Multi-path interference is often considered when modelling propagation of underwater sounds from source to receiver. When close to, or on the seabed, a hydrophone receives the direct and bottom reflected signals at nearly identical times. The resulting interference leads to an effective receive beam pattern that depends not only on source and receiver position and water depth, but also on the seabed characteristics, which affect the phase and magnitude of the reflection coefficient. Numerical acoustic propagation models account for this phenomenon automatically, however; it is important that it be taken into account when received signals are used to carry out simple calculations of source levels of nearby sources based on spherical spreading. Australian waters lie above seabeds of greatly differing acoustic properties. Compressional and shear sound speeds and absorption properties for four bottom types (basalt, calcarenite, sand and silt) were used to model the effective receive beam pattern of a hydrophone located on the seafloor. Modelling was carried out for all four seabeds as well as a seabed comprising differing thicknesses of sand over a calcarenite half space. The effects of the resulting receive beam pattern on estimations of source levels and locations are discussed.

dc.publisherThe Australian Acoustical Society
dc.titleThe effect of seabed properties on the receive beam pattern of a hydrophone located on the seafloor.
dc.typeJournal Article
dcterms.source.startPage106
dcterms.source.endPage112
dcterms.source.issn0814-6039
dcterms.source.titleAustralian Acoustical Society
dcterms.source.seriesAustralian Acoustical Society
dcterms.source.conferenceAcoustics Australia
dcterms.source.conference-start-dateNov 2 2011
dcterms.source.conferencelocationGold Coast, Qld, Australia
dcterms.source.placeQld, Australia
curtin.departmentCentre for Marine Science & Technology (COE)
curtin.accessStatusFulltext not available


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