The effect of sediment layering on ocean bottom reflection loss


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


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


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




How to Cite

Desharnais F. The effect of sediment layering on ocean bottom reflection loss. Canadian Acoustics [Internet]. 1991 Sep. 1 [cited 2023 Jan. 31];19(4):73-4. Available from:



Proceedings of the Acoustics Week in Canada