Shannon Rankin
National Oceanic and Atmospheric Administration
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Publications 66
#1Anne E. Simonis (NOAA: National Oceanic and Atmospheric Administration)H-Index: 8
#2Karin A. Forney (Moss Landing Marine Laboratories)H-Index: 26
Last. Simone Baumann-Pickering (SIO: Scripps Institution of Oceanography)H-Index: 12
view all 10 authors...
Anthropogenic noise is a known threat to marine mammals. Decades of research have shown that harbor porpoises are particularly sensitive to anthropogenic noise, and geographic displacement is a common impact from noise exposure. Small, localized populations may be particularly vulnerable to impacts associated with displacement, as animals that are excluded from their primary habitat may have reduced foraging success and survival, or be exposed to increased threats of predation or bycatch. Seal b...
#1Frederick I. ArcherH-Index: 20
#2Shannon RankinH-Index: 16
Last. Julien Delarue (JASCO Applied Sciences)H-Index: 7
view all 5 authors...
#1Aaron Thode (UCSD: University of California, San Diego)H-Index: 19
#2Taiki Sakai (NOAA: National Oceanic and Atmospheric Administration)
Last. Katherine H. KimH-Index: 5
view all 7 authors...
The AN/SSQ-53 Directional Frequency Analysis and Recording (DIFAR) sonobuoy is an expendable device that can derive acoustic particle velocity along two orthogonal horizontal axes, along with acoustic pressure. This information enables computation of azimuths of low-frequency acoustic sources from a single compact sensor. The standard approach for estimating azimuth from these sensors is by conventional beamforming (i.e., adding weighted time series), but the resulting “cardioid” beampattern is ...
#1Shannon RankinH-Index: 16
#2Manuel CastelloteH-Index: 1
view all 11 authors...
#1Brian S. Miller (AAD: Australian Antarctic Division)H-Index: 9
#2Simon Wotherspoon (UTAS: University of Tasmania)H-Index: 21
Last. Jennifer L. Keating (Joint Institute for Marine and Atmospheric Research)H-Index: 3
view all 6 authors...
A maximum likelihood method is presented for estimating drift direction and speed of a directional sonobuoy given the deployment location and a time series of acoustic bearings to a sound source at known position. The viability of this method is demonstrated by applying it to two real-world scenarios: (1) during a calibration trial where buoys were independently tracked via satellite, and (2) by applying the technique to sonobuoy recordings of a vocalising Antarctic blue whale that was simultane...
1 CitationsSource
Discrimination of bioacoustic signals to the species or population level is critical for using passive acoustic monitoring to study cetacean ecology. Risso's dolphins off southern California have distinctive peaks and notches in their echolocation clicks, but it was unknown whether Risso's dolphins from other geographic areas have similarly distinctive click spectra and whether populations are acoustically distinct. This study investigates using clicks for species and population identification b...
1 CitationsSource
#1Shannon Rankin (NOAA: National Oceanic and Atmospheric Administration)H-Index: 16
#2Frederick I. Archer (NOAA: National Oceanic and Atmospheric Administration)H-Index: 20
Last. Jay Barlow (NOAA: National Oceanic and Atmospheric Administration)H-Index: 45
view all 7 authors...
Passive acoustic monitoring of dolphins is limited by our ability to classify calls to species. Significant overlap in call characteristics among many species, combined with a wide range of call types and acoustic behavior, makes classification of calls to species challenging. Here, we introduce BANTER, a compound acoustic classification method for dolphins that utilizes information from all call types produced by dolphins rather than a single call type, as has been typical for acoustic classifi...
5 CitationsSource
Echolocation signals produced by beaked whales (family: Ziphiidae) include frequency-modulated (FM) pulses that appear to have species-specific characteristics. To date there has been no established evidence that a single species of beaked whale might produce more than one type of FM pulse. In 2014 a group of Blainville's beaked whales (Mesoplodon densirostris) were sighted off of Southern California; recordings included FM pulses with significant increases in peak frequency, center frequency, a...
1 CitationsSource
#1Yvonne BarkleyH-Index: 3
#2Jay BarlowH-Index: 45
Last. Erin M. OlesonH-Index: 7
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The following document presents the result of a project aimed at improving the hydrodynamics of the volumetric array design for towing at faster speeds of 10 knots from large research vessels. The document explains the theory behind the design considerations for each prototype presented, sea trial results and subsequent modifications, and discuss improvements for future designs.
#1Shannon Rankin (NMFS: National Marine Fisheries Service)H-Index: 16
#2Julie N. OswaldH-Index: 12
Last. Jay Barlow (NMFS: National Marine Fisheries Service)H-Index: 45
view all 4 authors...
12 CitationsSource