Results 11 to 20 of about 594,002 (213)

A risk function for behavioral disruption of Blainville's beaked whales (Mesoplodon densirostris) from mid-frequency active sonar. [PDF]

PLoS ONE, 2014
There is increasing concern about the potential effects of noise pollution on marine life in the world's oceans. For marine mammals, anthropogenic sounds may cause behavioral disruption, and this can be quantified using a risk function that relates sound
David Moretti, Len Thomas, Tiago Marques, John Harwood, Ashley Dilley, Bert Neales, Jessica Shaffer, Elena McCarthy, Leslie New, Susan Jarvis, Ronald Morrissey   +10 more
doaj   +3 more sources

Simulated Research on Passive Sonar Range Using Different Hydrographic Conditions

MATEC Web of Conferences, 2015
As an example using the passive sonar, it calculated the quality factor of passive sonar using the sonar equation. The sound field was calculated under different depth and range using multiform hydrographic conditions.
Han Jing, Zhang XueGang, Meng ChunXia, Cao Feng   +3 more
doaj   +3 more sources

Quantifying Efforts to Mitigate Interference between an Unmanned Surface Vessel and Starfish 990F for the Identification of Underwater Features in the Littoral Zone

Journal of Marine Science and Engineering, 2022
Effective testing of new sensing technologies requires realistic yet deterministic test ranges. The advancements in customizable, adaptive unmanned surface vessels (USV) have contributed to the increasing presence of USVs completing maritime site ...
Kainani Santos, A Zachary Trimble
doaj   +1 more source

Tracking a Ground Target Utilizing Doppler-Only Measurements of a Single Passive Sonar Sensor Assisted by Straight Road Constraints

IEEE Access, 2022
This paper handles tracking a ground target using a single passive sonar sensor measuring doppler shift of the target. We consider a scenario where the frequency of the emitting tone is not known in advance.
Jonghoek Kim
doaj   +1 more source

Eavesdropping like a bat: Towards fusing active and passive sonar for a case study in simultaneous localization and mapping

IET Radar, Sonar & Navigation, 2021
Among so‐called active sensors that use self‐generated signals, sonar sensors are more challenging to implement than lidar and radar due in part to their limited angular field of sensing. A common solution to this challenge is scanning sensors that sweep
Masoud Jahromi Shirazi, Nicole Abaid
doaj   +1 more source

Deep‐learning‐based line enhancer for passive sonar systems

IET Radar, Sonar & Navigation, 2022
Detection of acoustic tonals from surfaces and underwater vehicles is important for passive sonar systems. Enhancements of the tonals are usually necessary in passive sonar prior to detections.
Donghao Ju, Cheng Chi, Zigao Li, Yu Li, Chunhua Zhang, Haining Huang   +5 more
doaj   +1 more source

Changes in the Movement and Calling Behavior of Minke Whales (Balaenoptera acutorostrata) in Response to Navy Training

Frontiers in Marine Science, 2021
Many marine mammals rely on sound for foraging, maintaining group cohesion, navigation, finding mates, and avoiding predators. These behaviors are potentially disrupted by anthropogenic noise.
Ian N. Durbach, Ian N. Durbach, Catriona M. Harris, Cameron Martin, Tyler A. Helble, E. Elizabeth Henderson, Glenn Ierley, Len Thomas, Stephen W. Martin   +8 more
doaj   +1 more source

A Survey of Underwater Acoustic Data Classification Methods Using Deep Learning for Shoreline Surveillance

Sensors, 2022
This paper presents a comprehensive overview of current deep-learning methods for automatic object classification of underwater sonar data for shoreline surveillance, concentrating mostly on the classification of vessels from passive sonar data and the ...
Lucas C. F. Domingos, Paulo E. Santos, Phillip S. M. Skelton, Russell S. A. Brinkworth, Karl Sammut   +4 more
doaj   +1 more source

Beaked whales respond to simulated and actual navy sonar [PDF]

, 2011
This article is distributed under the terms of the Creative Commons Public Domain declaration. The definitive version was published in PLoS One 6 (2011): e17009, doi:10.1371/journal.pone.0017009.Beaked whales have mass stranded during some naval sonar ...
Christopher W. Clark, Walter M. X. Zimmer, DiMarzio Nancy, Boyd Ian L., Durban, John W., Durban John W., Brandon L Southall, Moretti, David, Tyack, Peter L., Claridge Diane E., DiMarzio, Nancy A., Angela D'Amico, Peter L. Tyack, Ian L. Boyd, David Moretti, D'Amico, Angela, Ward, Jessica, John W Durban, Ward Jessica, Zimmer Walter M. X., Walter M X Zimmer, McCarthy, Elena, Peter L Tyack, Jessica Ward, Clark Christopher W., Brandon L. Southall, D'Amico Angela, Boyd, Ian L., Claridge, Diane E., Moretti David, Jarvis, Susan, Ian L Boyd, Morrissey, Ronald, Southall Brandon L., John W. Durban, Clark, Christopher W., Susan Jarvis, Nancy DiMarzio, Morrissey Ronald, Diane E. Claridge, Ronald Morrissey, Tyack Peter L., Zimmer, Walter M. X., Jarvis Susan, Southall, Brandon L., Christopher W Clark, Elena McCarthy, Moretti, David J., DiMarzio, Nancy, Diane E Claridge, McCarthy Elena   +50 more
core   +1 more source

Pulsed Active Sonar Using Generalized Sinusoidal Frequency Modulation for High-Speed Underwater Target Detection and Tracking

IEEE Access, 2023
For decades, the soft-kill strategy which detects high-speed underwater targets with passive sonar and attract the targets using decoys has been used. However, recently, the paradigm to respond to the high-speed underwater targets is shifting to a hard ...
Jinuk Park, Geunhwan Kim, Jongwon Seok, Jungpyo Hong   +3 more
doaj   +1 more source