Dual frequency acoustic classification of seafloor habitat using the QTC VIEW

Galloway, James L.; Collins, W.T.

doi:10.1109/oceans.1998.726277

Cited by 14 publications

(6 citation statements)

References 1 publication

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“…The tubes of Lanice conchilega can also be detected by hydroacoustic measurements (Galloway and Collins, 1998;Ellingsen et al, 2002;Freitas et al, 2003;Wienberg and Bartholomä, 2005;Markert et al, 2013Markert et al, , 2015. Bartholomä (2006) stated that the occurrence of benthic faunal patterns covering a few m 2 immediately produces changes in backscatter signals.…”

Section: Outer Nearshore Zone and Offshore Zonementioning

confidence: 99%

Near- and Offshore Macrofauna Communities and Their Physical Environment in a South-Eastern North Sea Sandy Beach System

et al. 2018

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Section: Outer Nearshore Zone and Offshore Zonementioning

confidence: 99%

Near- and Offshore Macrofauna Communities and Their Physical Environment in a South-Eastern North Sea Sandy Beach System

et al. 2018

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“…The echoes were processed using QTC VIEWM technology [6]. After picking the bottom, aligning with respect to the bottom pick, and stacking to reduce noise, a suite of algorithms was employed to extract features from the echoes.…”

Section: Ill Geotechnical Datamentioning

confidence: 99%

The strength of correlations between geotechnical variables and acoustic classifications

Preston

Collins²,

Mosher³

et al.

Oceans '99. MTS/IEEE. Riding the Crest Into the 21st Century. Conference and Exhibition. Conference Proceedings (IEEE Cat. No.9

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Seabed grain size, shear strength, bearing strength, and porosity were measured at 15 sites, all in bays and harbours around southern Vancouver Island. Sounder echoes at 38 and 200 kHz from the same sites were classified using the QTC VIEWTM technology. This approach uses a feature set generated from the direct echoes by a set of algorithms and then reduced by multivariate analysis, with similar acoustic responses put into the same class. Canonical correlation analysis was used to uncover correlations between two data sets: the frequency of occurrence of each acoustic class, and the four geotechnical variables. Bearing strength was found to be the major contributor to the first geotechnical canonical variable, which correlated with classes from the 38-kHz echoes with a coefficient of 0.94.

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“…Hydroacoustic examination of the seabed upper layer requires systems with high directivity beams in order to minimize sediment reverberation (Galloway, Collins, 1998;Hamilton et al, 1999). Parametric sonar systems meet this requirement and generate low-frequency/wide-band beams with extremely concentrated main lobes (Grelowska et al, 2010; Kozaczka et al, 2012a).…”

Section: Introductionmentioning

confidence: 99%

Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder

Kozaczka

Grelowska

Kozaczka

et al. 2013

Archives of Acoustics

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The paper contains results of a in situ research main task of which was to detect objects buried, partially or completely, in the sea bottom. Object detecting technologies employing acoustic wave sources based on nonlinear interaction of elastic waves require application of parametric sound sources. Detection of objects buried in the sea bottom with the use of classic hydroacoustic devices such as the sidescan sonar or multibeam echosounder proves ineffective. Wave frequencies used in such devices are generally larger than tens of kHz. This results in the fact that almost the whole acoustic energy is reflected from the bottom. On the other hand, parametric echosounders radiate waves with low frequency and narrow beam patterns which ensure high spatial resolution and allows to penetrate the sea bottom to depths of the order of tens of meters. This allows to detect objects that can be interesting, among other things, from archaeological or military point of view.

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Dual frequency acoustic classification of seafloor habitat using the QTC VIEW

Cited by 14 publications

References 1 publication

Near- and Offshore Macrofauna Communities and Their Physical Environment in a South-Eastern North Sea Sandy Beach System

Near- and Offshore Macrofauna Communities and Their Physical Environment in a South-Eastern North Sea Sandy Beach System

The strength of correlations between geotechnical variables and acoustic classifications

Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder

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