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

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...

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Bibliographic Details
Main Author: Moore, Therese C.
Other Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Format: Text
Language:English
Published: 1999
Subjects:
Acoustic Detection and Detectors
*TOWED ARRAYS
*SIGNALS
*ACOUSTIC ARRAYS
*WHALES
SOURCES
POSITION(LOCATION)
MONITORING
TRACKING
THESES
ESTIMATES
HYDROPHONES
OBSERVATORIES
RESEARCH SHIPS
MBNMS(MONTEREY BAY NATIONAL MARINE SANCTUARY)
OAO(OCEAN ACOUSTIC OBSERVATORY)
Blue whale
Online Access:http://www.dtic.mil/docs/citations/ADA366864
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA366864
Description
Summary: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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