PMID: 15376646Sep 21, 2004Paper

Directional frequency and recording (DIFAR) sensors in seafloor recorders to locate calling bowhead whales during their fall migration

The Journal of the Acoustical Society of America
Charles R GreeneW John Richardson

Abstract

Bowhead whales, Balaena mysticetus, migrate west during fall approximately 10-75 km off the north coast of Alaska, passing the petroleum developments around Prudhoe Bay. Oil production operations on an artificial island 5 km offshore create sounds heard by some whales. As part of an effort to assess whether migrating whales deflect farther offshore at times with high industrial noise, an acoustical approach was selected for localizing calling whales. The technique incorporated DIFAR (directional frequency and recording) sonobuoy techniques. An array of 11 DASARs (directional autonomous seafloor acoustic recorders) was built and installed with unit-to-unit separation of 5 km. When two or more DASARs detected the same call, the whale location was determined from the bearing intersections. This article describes the acoustic methods used to determine the locations of the calling bowhead whales and shows the types and precision of the data acquired. Calibration transmissions at GPS-measured times and locations provided measures of the individual DASAR clock drift and directional orientation. The standard error of the bearing measurements at distances of 3-4 km was approximately 1.35 degrees after corrections for gain imbalance in t...Continue Reading

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Citations

Nov 30, 2010·The Journal of the Acoustical Society of America·Aaron ThodeKendall Folkert
May 9, 2012·The Journal of the Acoustical Society of America·Aaron M ThodeA Michael Macrander
Oct 26, 2010·The Journal of the Acoustical Society of America·Aaron ThodeEthan Roth
Feb 23, 2012·The Journal of the Acoustical Society of America·Qilin ZhangJian Li
Jul 7, 2007·The Journal of the Acoustical Society of America·Kevin B Smith, A Vincent van Leijen
Nov 18, 2011·The Journal of the Acoustical Society of America·Melania GuerraA Michael Macrander
Oct 9, 2012·The Journal of the Acoustical Society of America·William S D Wilcock
Jul 6, 2014·The Journal of the Acoustical Society of America·Julien BonnelA Michael Macrander
Jul 6, 2014·The Journal of the Acoustical Society of America·Shima H AbadiDavid R Dowling
Jan 3, 2016·The Journal of the Acoustical Society of America·Shima H AbadiSuzanne M Carbotte
Apr 3, 2016·The Journal of the Acoustical Society of America·Brian S MillerMichael C Double
Apr 24, 2016·The Journal of the Acoustical Society of America·Aaron M ThodeCharles R Greene
Jun 15, 2011·Marine Pollution Bulletin·M AndréJ V Castell
Aug 1, 2016·The Journal of the Acoustical Society of America·Graham A WarnerJan Dettmer
Nov 22, 2017·PloS One·Susanna B BlackwellKatherine H Kim
Feb 3, 2018·The Journal of the Acoustical Society of America·Brian S MillerJennifer L Keating
Aug 3, 2019·The Journal of the Acoustical Society of America·Aaron M ThodeKatherine H Kim
Apr 5, 2017·The Journal of the Acoustical Society of America·Graham A WarnerDavid E Hannay
Oct 3, 2020·The Journal of the Acoustical Society of America·Gongping HuangJacob Benesty
Oct 2, 2017·The Journal of the Acoustical Society of America·Aaron M ThodeA Michael Macrander
Jan 4, 2017·The Journal of the Acoustical Society of America·Aaron M ThodeA Michael Macrander
Jul 10, 2021·The Journal of the Acoustical Society of America·Susanna B BlackwellKatherine H Kim

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