Results 121 to 130 of about 632,387 (252)

Predictions of the Effect of Non-Homogeneous Ocean Bubbles on Sound Propagation

Journal of Marine Science and Engineering
In the ocean, bubbles rarely appear alone and are often not evenly distributed, which makes it complicated to predict the effect of ocean bubbles on sound propagation. To solve this problem, researchers have tried to use approximations such as equivalent
Yuezhu Cheng, Jie Shi, Yuan Cao, Haoyang Zhang   +3 more
doaj   +1 more source

Eccentricity effects on acoustic radiation from a spherical source suspended within a thermoviscous fluid sphere

, 2003
Acoustic radiation from a spherical source undergoing angularly periodic axisymmetric harmonic surface vibrations while eccentrically suspended within a thermoviscous fluid sphere, which is immersed in a viscous thermally conducting unbounded fluid ...
Azarpeyvand, Mahdi, Hasheminejad, Seyyed M., Hasheminejad, S.M., Azarpeyvand, M.   +3 more
core   +1 more source

Biomimetic robots driven by smart materials: Motion forms, stimulation methods and applications

Responsive Materials, EarlyView.
Biomimetic robots enhance adaptability by mimicking biological systems, but rigid materials limit performance. Smart materials with stimuli responsiveness and shape adaptability enable more flexible actuation and improved environmental interaction.
Zeyu Yang, Yehong Peng, Shibo Xue, Yujiang Zhuang, Xiang Gong, Guiwei Li, Lei Ren, Wenzheng Wu, Luquan Ren   +8 more
wiley   +1 more source

Low-power low-cost acoustic underwater modem

, 2016
Recent advances in electronics and robotics enable automated and potentially unsupervised environmental underwater inshore monitoring with swarms of small, low-power, autonomous underwater vehicles (AUV). To enable flexible and self-organizing operation,
Meyer, Benjamin, Maehle, Erik, Gabrecht, Alexander, Renner, Bernd-Christian, Osterloh, Christoph   +4 more
core   +1 more source

Multi‐Platform Deployments of Low‐Cost Devices for Cetacean Passive Acoustic Monitoring

Remote Sensing in Ecology and Conservation, EarlyView.
Recent advances in affordable, user‐friendly devices offer new opportunities to overcome cost constraints of underwater passive acoustic monitoring (PAM) and expand acoustic data collection. In this study, we deployed low‐cost acoustic recorders and underwater cameras across a range of platforms in the Western Mediterranean, including fishing gear ...
Greta Jankauskaite, François Poisson, Irati Abascal, Javier Menéndez‐Blázquez, Clara Cánovas Pérez, Sofia Conti, Ricardo Sagarminaga, Juan Antonio Raga, David March   +8 more
wiley   +1 more source

A Study on the Wide-Sense Stationarity of the Underwater Acoustic Channel for Coherent Communication Systems

, 2011
In this paper, we test the wide sense stationarity of the estimation error achieved by an exponentially weighted least squares algorithm, used to estimate the channel impulse response.
James Preisig, Beatrice Tomasi, ZORZI, MICHELE   +2 more
core  

Widespread Bomb Fishing in Indo‐Pacific Archipelago Revealed Through Machine Learning Accelerated Passive Acoustic Monitoring

Remote Sensing in Ecology and Conservation, EarlyView.
AI‐accelerated passive acoustic monitoring reveals extensive bomb fishing within the Spermonde Archipelago, with annual incidents numbering in the thousands. ABSTRACT Bomb fishing is recognised as the most destructive fishing practice that can be performed in our oceans.
Ben Williams, Mars Coral Restoration Project Monitoring Team, Aimee du Luart, Sonny Burniston, Tries B. Razak, Timothy A. C. Lamont, David J. Smith, Jamaluddin Jompa, David Curnick, Kate E. Jones   +9 more
wiley   +1 more source

Few Annotations, High Accuracy: Transfer Learning and Data Augmentation Improve Passive Acoustic Monitoring of the Vulnerable African Manatee

Remote Sensing in Ecology and Conservation, EarlyView.
Can deep learning reliably detect a threatened species in passive acoustic monitoring with few annotations? Across 52 sites and 600 recording days, we compared two deep learning recognizers with the traditional machine learning Kaleidoscope for detecting African manatee vocalizations.
Lucas Dubus, Auguste Verdier, Nina Giotto, Grace Mbemba, Gabriel Michelin, Baptiste Mulot, Stéphanie Manel, David Mouillot   +7 more
wiley   +1 more source

Towards underwater acoustic communications for swimmer and diver wearables

The wearable technology market is expanding rapidly. To advance data communications for swimmer and diver wearables, very-high-frequency (VHF) underwater acoustic channels were characterized and a platform for modulation/transducer development was built.
Blom, K.C.H., Neer, P.L.M.J. van, Dol, H.S., Schrama, T.   +3 more
core  

Repurposing Bird‐Based Acoustic Models for Amphibian Surveys: Strengths and Limitations in Real‐World Deployments

Remote Sensing in Ecology and Conservation, EarlyView.
In this study, we developed AnuraSearch, an open‐source classifier for 11 Ukrainian amphibian species, by repurposing the avian BirdNET algorithm via transfer learning to process over 18,000 h of autonomous acoustic recordings. Although the model demonstrated high precision and successfully reconstructed detailed seasonal and diel vocal activity ...
Vasylyna Strus, Yurii Strus, Nazar Smirnov, Anna Fedorova, Nataliia Suriadna, Mykola Drohvalenko   +5 more
wiley   +1 more source