Analysis of vertical noise coherence data from the EC-VNCI data set

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Authors
  1. Weatherbee, C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Dalhousie Univ, Halifax NS (CAN) Dept of Oceanography
Abstract
In a shallow water environment, some physical properties of the surficial sediments, such as the compressional and shear speed, can be derived from ambient noise data. Vertical noise coherence data were collected over five sites on the Scotian Shelf and Laurentian Channel. The sites were chosen because of their various sediment properties, in order to quantify whether the differences in vertical coherence would allow differentiation among sediment types. It was found that some sediment types could be differentiated using either the real or imaginary part of the vertical noise coherence (e.g. Sable Island gravel from LaHave clay), while others showed coherence results that were too similar to be differentiated using this technique (e.g. Scotian Shelf drift and LaHave clay). Sites with shipping noise contamination can be difficult to classify.
Keywords
Vertical coherence;Acoustic models;Ambient noise;Seabeds;Inversions;Laurentian Channel
Report Number
DREA-CR-2000-030 — Contractor Report
Date of publication
01 Mar 2000
Number of Pages
47
DSTKIM No
CA010987
CANDIS No
515069
Format(s):
Hardcopy;Document Image stored on Optical Disk

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