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Communication dans un congrès

Seabed geoacoustic characterization and classification by multisonar fusion

Ridha Fezzani 1 Benoit Zerr 1 Michel Legris 1 Yann Stephan 2
1 Lab-STICC_ENSTAB_CID_SFIIS ; OSM
STIC - Pôle STIC [Brest], Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : This paper deals with potentialities of improvement of seabed geoacoustic properties characterization and classification by multisensor fusion. The aim of this work is to improve the performance prediction of low frequencies sonar (Anti Submarine Warfare). Geoacoustic and scattering properties estimation by inversion of received acoustic signals remains very difficult and strongly dependent on the system of measurement. Indeed the interaction between an acoustic wave and the sediment is heavily dependent on frequency, measurement angle and micro roughness of seafloor. The fusion of geoacoustic models inverted from different sonar systems with wide diversity of insonification angles and frequencies (single beam echosounder, multibeam echosounder, sidescan sonar and subbottom profiler) allow an extended description of the acoustic properties of the seafloor and the first sediment layers. A characterization method based on the Dempster Shafer theory of evidence is used to fuse geoacoustic models in order to classify the seafloor in three homogeneous acoustic zones (scattered solid, reflective fluid and absorbent fluid). Then, estimation of the geoacoustic parameters is conducted on each zone.
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https://hal-ensta-bretagne.archives-ouvertes.fr/hal-00729000
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Soumis le : vendredi 7 septembre 2012 - 15:01:14
Dernière modification le : mercredi 24 juin 2020 - 16:19:22
Archivage à long terme le : : samedi 8 décembre 2012 - 03:40:37

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R.Fezzani_ECUA12.pdf
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  • HAL Id : hal-00729000, version 1

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Ridha Fezzani, Benoit Zerr, Michel Legris, Yann Stephan. Seabed geoacoustic characterization and classification by multisonar fusion. ECUA 2012, Jul 2012, Edimburgh, United Kingdom. ⟨hal-00729000⟩

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