Results 111 to 120 of about 12,723 (151)

Passive acoustic monitoring using random matrix theory

2012 IEEE Statistical Signal Processing Workshop (SSP), 2012
Cross-correlating ocean noise is a potential alternative to using active sources to monitor and study ocean environments. However, directional sources in the medium (usually ships) often introduce a bias in the cross-correlations, making the travel time estimates unreliable. Here, we use recent results in random matrix theory for the eigenvalue density
Ravishankar Menon, Peter Gerstoft, William S. Hodgkiss   +2 more
openaire   +1 more source

Passive acoustic monitoring of haddock in the Gulf of Maine

The Journal of the Acoustical Society of America, 2017
We have conducted several studies of haddock sounds in the Gulf of Maine (GOM) with mixed results. An analysis of an archival recording from captive haddock brood stock made in 1970 found that the “spawning rumble” sound occurred variously at the end of short thump trains, in the middle of thump trains, or in isolation.
Rodney A. Rountree, Katie A. Burchard, Xavier Mouy, Clifford A. Goudey, Francis Juanes   +4 more
openaire   +1 more source

Using passive acoustics for monitoring seagrass beds

OCEANS 2016 MTS/IEEE Monterey, 2016
This paper discusses the ambient noise acquired during the period of one week, from May 8 to 15, 2013 over a Posidonia oceanica bed in the Bay of la Revellata, Calvi, Corsica. The acoustic receivers were moored at 3 locations with water depth ranging from 2 to 20 m. Simultaneously with acoustic measurements, the dissolved O2 was measured by an array of
P. Felisberto, O. Rodriguez, P. Santos, F. Zabel, S.M. Jesus   +4 more
openaire   +1 more source

Passive Acoustic Monitoring of Surface Vessel Activity

Volume 4: Ocean Engineering; Ocean Renewable Energy; Ocean Space Utilization, Parts A and B, 2009
Monitoring human activity in remote marine areas is a challenging problem to which acoustic methods present a promising solution. This paper develops and demonstrates automated passive acoustic methods to estimate ranges to surface vessels using a single seafloor-mounted hydrophone.
Eva-Marie Nosal, Miloslav Nosal
openaire   +1 more source

Glider-Based Passive Acoustic Monitoring in the Arctic

Marine Technology Society Journal, 2014
AbstractPersistently poor weather in the Arctic makes traditional marine mammal research from aircraft and ships difficult, yet collecting information on marine mammal distribution and habitat utilization is vital for understanding the impact of climate change on Arctic ecosystems.
Mark F. Baumgartner, Kathleen M. Stafford, Peter Winsor, Hank Statscewich, David M. Fratantoni   +4 more
openaire   +1 more source

Passive Acoustic Detection and Monitoring of Schools of Herring

The Journal of the Acoustical Society of America, 2008
Passive acoustic detection and monitoring of various marine fishes has recently received much attention in the literature. It has been recognized that passive acoustic techniques have the potential to complement traditional active acoustic surveys and to significantly increase their overall efficiency, if the acoustic signatures of the considered ...
Thomas R. Hahn, Gary L. Thomas
openaire   +1 more source

Passive Acoustic Monitoring of Cetaceans

2011
Passive acoustic monitoring is increasingly used by the scientific community to study, survey and census marine mammals, especially cetaceans, many of which are easier to hear than to see. PAM is also used to support efforts to mitigate potential negative effects of human activities such as ship traffic, military and civilian sonar and offshore ...
openaire   +1 more source

The possibility of passive acoustic monitoring of a Scuba Diver

Doklady Earth Sciences, 2016
The problem of controlling the state and location of scuba divers is of importance. This work consider the possibility to use for this purpose a low-frequency noise of a scuba diver. The noise of a scuba diver under a dry swimming suite near the trachea and in the water at a distance of 50 m was recorded.It wa shown that both sygnals are characterized ...
V. I. Korenbaum, S. V. Gorovoy, A. A. Tagiltsev, A. E. Kostiv, A. E. Borodin, I. A. Pochekutova, A. M. Vasilistov, A. C. Krupenkov, A. D. Shiryaev, D. I. Vlasov   +9 more
openaire   +1 more source

Passive acoustics for monitoring bottom contact of dredge

2017 IEEE/OES Acoustics in Underwater Geosciences Symposium (RIO Acoustics), 2017
In Argentina, stock assessment of Patagonian scallop (Zygochlamys patagonica) is carried out applying the swept area method using a dredge. Hence, for the accuracy of the biomass estimation contact of the dredge with the bottom is critical. Generally during these surveys the dredge contact with the bottom is determined by taking into account warp ...
Ariel Gustavo Cabreira, Silvana Campodonico, Javier Villalba   +2 more
openaire   +1 more source

Passive acoustic monitoring of cetaceans with KM3NeT acoustic receivers

Journal of Instrumentation, 2021
C. Guidi, M. Bou-Cabo, G. Lara
openaire   +1 more source