The effect of sediment layering on ocean bottom reflection loss

Auteurs-es

  • F. Desharnais Defence Res. Establ. Atlantic, Dartmouth, NS, Canada

Mots-clés :

acoustic wave reflection, sediments, underwater sound, effect of sediment layering, ocean bottom reflection loss, turbidity currents, geographical location, contour currents, ice-rafting, core samples, centre frequency

Résumé

Various sets of bottom loss data from areas with turbidity currents indicate high acoustic reflectivity at a certain frequency band. The centre frequency of the band varies with geographical location. Different sedimentation processes affect the average speed of the sediments at a particular site and the vertical distribution of the layers. Turbidity currents, contour currents and ice-rafting all can create an alternation of layers of different impedances by the sediment-water interface. It was shown that core samples could potentially be used to estimate the centre frequency of the low bottom loss frequency band. Statistics of core properties of different areas with known sedimentation could improve the knowledge of bottom losses for remote areas

Fichiers supplémentaires

Publié-e

1991-09-01

Comment citer

1.
Desharnais F. The effect of sediment layering on ocean bottom reflection loss. Canadian Acoustics [Internet]. 1 sept. 1991 [cité 14 mai 2026];19(4):73-4. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/675

Numéro

Vol. 19 No. 4 (1991)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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