Results 31 to 40 of about 2,333 (168)

Broadband classification and statistics of echoes from aggregations of fish measured by long-range, mid-frequency sonar [PDF]

open access: yes, 2017
Author Posting. © Acoustical Society of America, 2017. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution.
Colosi, John A.   +5 more
core   +2 more sources

Vocalization Source Level Distributions and Pulse Compression Gains of Diverse Baleen Whale Species in the Gulf of Maine

open access: yesRemote Sensing, 2016
The vocalization source level distributions and pulse compression gains are estimated for four distinct baleen whale species in the Gulf of Maine: fin, sei, minke and an unidentified baleen whale species.
Delin Wang   +3 more
doaj   +1 more source

Low-frequency target strength and abundance of shoaling Atlantic herring (Clupea harengus) in the Gulf of Maine during the Ocean Acoustic Waveguide Remote Sensing 2006 Experiment [PDF]

open access: yesThe Journal of the Acoustical Society of America, 2010
The low-frequency target strength of shoaling Atlantic herring (Clupea harengus) in the Gulf of Maine during Autumn 2006 spawning season is estimated from experimental data acquired simultaneously at multiple frequencies in the 300–1200Hz range using (1) a low-frequency ocean acoustic waveguide remote sensing (OAWRS) system, (2) areal population ...
Gong, Zheng   +6 more
openaire   +3 more sources

Using a coherent hydrophone array for observing sperm whale range, classification, and shallow-water dive profiles [PDF]

open access: yes, 2014
Sperm whales in the New England continental shelf and slope were passively localized, in both range and bearing, and classified using a single low-frequency (
Alexander C. Bohn   +9 more
core   +1 more source

Continental Shelf-Scale Passive Acoustic Detection and Characterization of Diesel-Electric Ships Using a Coherent Hydrophone Array

open access: yesRemote Sensing, 2017
The passive ocean acoustic waveguide remote sensing (POAWRS) technique is employed to detect and characterize the underwater sound radiated from three scientific research and fishing vessels received at long ranges on a large-aperture densely-sampled ...
Wei Huang   +4 more
doaj   +1 more source

Instantaneous 3D Continental-Shelf Scale Imaging of Oceanic Fish by Multi-Spectral Resonance Sensing Reveals Group Behavior during Spawning Migration

open access: yesRemote Sensing, 2018
The migration of extensive social groups towards specific spawning grounds in vast and diverse ocean environments is an integral part of the regular spawning process of many oceanic fish species.
Dong Hoon Yi   +4 more
doaj   +1 more source

Collection of remote optical signals by air waveguides

open access: yes, 2014
Collection of weak signals from remote locations is the primary goal and the primary hurdle of optical stand-off detection schemes. Typically, the measured signal is enhanced using large numerical aperture collection optics and high gain detectors.
Jhajj, N.   +3 more
core   +1 more source

Diel and Spatial Dependence of Humpback Song and Non-Song Vocalizations in Fish Spawning Ground

open access: yesRemote Sensing, 2016
The vocalization behavior of humpback whales was monitored over vast areas of the Gulf of Maine using the passive ocean acoustic waveguide remote sensing technique (POAWRS) over multiple diel cycles in Fall 2006.
Wei Huang, Delin Wang, Purnima Ratilal
doaj   +1 more source

Near resonance acoustic scattering from organized schools of juvenile Atlantic bluefin tuna (Thunnus thynnus) [PDF]

open access: yes, 2013
Schools of Atlantic bluefin tuna (Thunnus thynnus) can exhibit highly organized spatial structure within the school. This structure was quantified for dome shaped schools using both aerial imagery collected from a commercial spotter plane and 400 kHz ...
Lutcavage, Molly   +2 more
core   +3 more sources

Statistical Models for Infrasonic Propagation: Application to the Detection Capability of the Global IMS Network

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 24, 28 December 2025.
Abstract The detection capability of the global infrasound International Monitoring System (IMS) deployed to monitor compliance with the Comprehensive Nuclear‐Test‐Ban Treaty is highly variable in space and time. Previous studies estimated the source energy of near‐surface explosions from remote observations using empirical yield‐scaling relations ...
A. Le Pichon   +7 more
wiley   +1 more source

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