Estimation of the Source Signal Characteristics and Variability of Blue Whale Calls Using a Towed Array.

Abstract

A four-day experiment was conducted to study the feasibility of locating, tracking, and counting blue whales acoustically in the Monterey Bay National Marine Sanctuary (MBNMS) at long ranges using the shore-based NPS Ocean Acoustic Observatory (OAO) hydrophone array. In concert with the shore-based acoustic monitoring, an aircraft was assigned to locate whales and a research vessel was manned with observers and instrumented with a towed hydrophone array to determine whale locations and characterize their vocalizations in the near-field. Two transiting blue whales were observed and their vocalizations were recorded by the towed array in close proximity. In this thesis research, these towed array data were deverberated using modeled-based matched signal processing and least-squares fitting.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1999
Accession Number
ADA366864

Entities

People

  • Therese C. Moore

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Equipment
  • Acoustic Measurement
  • Acoustic Waves
  • Acoustics
  • Aircrafts
  • Algorithms
  • Arrays
  • Birds
  • Data Processing
  • Detection
  • Marine Mammals
  • Near Field
  • Oceanography
  • Signal Processing
  • Towed Arrays
  • Waves
  • Whales

Fields of Study

  • Environmental science

Readers

  • Marine Mammal Biology
  • Maritime and Naval Warfare Studies
  • Phased Array Antenna Design.