Marine Mammal Detection Final Report: Call-Up against the Noise Monitoring Standing Offer

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Authors
  1. Glessing, B.
  2. Hood, J.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);MacDonald Dettwiler and Associates Ltd, Dartmouth NS (CAN)
Abstract
This report documents the work done to prototype a marine mammal detection system. The resulting system will support environmental mitigation measures prior to, and during, active sonar trials and exercises. A working application was delivered at the end of the call-up that allows a user to configure and run detection processing, with live updates provided in the window, or to post-analyze data from a previous detection run. Once selected, an image of the detection and the corresponding detection log entries are presented to the user. The user can also listen to the detection and bring up a time series plot of the raw data. A cursor can be used to measure times and frequencies on the detection image. This system was used to process 30 minutes of Right whale data collected using sonobuoys. This data was collected by Francine Desharnais in the Bay of Fundy during the summer of 1999. This data included dead channels, considerable radio frequency (RF) interference and a digital data channel. Fifty-seven valid detections were made while the sixteen false alarms that did occur were easily classified and rejected. No analysis of missed contact was made. After a quick look at the data, it took an acoustic operator less than a second to recognize a valid call from a false alarm as he scrolled through the results. Aural listening quickly helped to confirm and adjust to valid vs. invalid contact differentiation. There is still considerable room for improvement in the automatic classific

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Keywords
Acoustic;Detection;Marine Mammal
Report Number
DRDC-ATLANTIC-CR-2005-271 — Contractor Report
Date of publication
01 Mar 2006
Number of Pages
42
DSTKIM No
CA027432
CANDIS No
525531
Format(s):
Electronic Document(PDF)

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