Passive acoustic detection and localization of Mesoplodon densirostris (Blainville's beaked whale) vocalizations using distributed bottom-mounted hydrophones in conjunction with a Digital Tag (DTAG) recording

  • Jessica Ward Naval Undersea Warfare Center Division Newport, 1176 Howell St., Newport, RI, United States
  • Ronald Morrissey Naval Undersea Warfare Center Division Newport, 1176 Howell St., Newport, RI, United States
  • David Moretti Naval Undersea Warfare Center Division Newport, 1176 Howell St., Newport, RI, United States
  • Nancy DiMarzio Naval Undersea Warfare Center Division Newport, 1176 Howell St., Newport, RI, United States
  • Susan Jarvis Naval Undersea Warfare Center Division Newport, 1176 Howell St., Newport, RI, United States
  • Mark Johnson Woods Hole Oceanographic Institute, Woods Hole, MA, United States
  • Peter Tyack Woods Hole Oceanographic Institute, Woods Hole, MA, United States
  • Charles White University of Rhode Island, Narragansett, RI, United States
Keywords: Acoustics, Fast Fourier transforms, Fourier transforms, Three dimensional, Wave filters, Aspect angles, Bahamas, Hyperbolic localization, Matched filtering

Abstract

Click data from a tagged Mesoplodon densirostris was compared with broadband acoustic recordings from an 82 hydrophone wide-baseline array located in the Tongue of the Ocean, Bahamas. Two detectors, a Fast Fourier Transform (FFT) based detector and matched filter, were evaluated in white noise and with the acoustic recordings from the array for performance detecting M. densirostris clicks. The matched filter performed the best, allowing 92% of the tagged animal's clicks to be detected on at least one hydrophone. Time Difference of Arrivals (TDOAs) between the DTag and the surrounding hydrophones were computed. These TDOAs were used to compute a three-dimensional hyperbolic localization track of the tagged animal. A maximum detection range of 6500 m from the tagged animal to the recording hydrophone was observed. Offset aspect angles were determined from the DTag heading information and the bearing to the receiving hydrophone. Clicks within ±30 degrees were detected at the farthest ranges, while clicks were detected at all off-set angles at closer ranges.
Published
2008-03-01
How to Cite
1.
Ward J, Morrissey R, Moretti D, DiMarzio N, Jarvis S, Johnson M, Tyack P, White C. Passive acoustic detection and localization of Mesoplodon densirostris (Blainville’s beaked whale) vocalizations using distributed bottom-mounted hydrophones in conjunction with a Digital Tag (DTAG) recording. Canadian Acoustics [Internet]. 2008Mar.1 [cited 2019Aug.25];36(1):60-6. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1992
Section
Proceedings of the Acoustics Week in Canada