Data Analysis for Underwater Environmental Acoustic Monitoring Technologies – Contractor Report

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Authors
  1. Hood, J.
  2. Bougher, B.
  3. Moors, H.
  4. Webster, P.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);Akoostix Inc, Dartmouth NS (CAN)
Abstract
Knowledge of cetacean distribution and abundance on the Scotian Shelf is limited and therefore planning of naval exercises that attempt to mitigate the impact of operations on marine mammals, especially cetaceans, is difficult. There are a number of barriers to improving knowledge some of which may be overcome with better approaches, sensor systems, and processes. The objective of this study was to examine the effectiveness of three types of acoustic sensor systems for detection of cetacean species typically found on the Scotian Shelf: autonomous underwater vehicles (AUV), floating sensors that broadcast acoustic data (sonobuoys), and bottom-moored sensor systems. Data was collected using each of the sensor systems during the winter of 2012. However, no AUV data was processed under this contract as it was collected near the completion of the contract. Data were processed to determine variation in ambient-noise level and for presence of cetacean vocalizations using a combination of automated and manual methods. The effectiveness of these methods and the sensor systems were examined, but conclusions were limited and no high-confidence cetacean vocalizations were found in the data. Since the data was collected in February/March, no cetaceans were expected to be in the area. The team also conducted a broader analysis, considering naval operations, biological factors, and sensor system capability in order to recommend an approach for enhancing DND’s ability to improve on current
Keywords
sonar;marine mammal detection
Report Number
DRDC-RDDC-2017-C087 — Contract Report
Date of publication
01 Mar 2012
Number of Pages
84
DSTKIM No
CA044920
CANDIS No
805297
Format(s):
Electronic Document(PDF)

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