Results 11 to 20 of about 217,231 (290)
Acoustic Shooting and Bounce Ray Method for Calculating Echoes of Complex Underwater Targets
Applied Sciences, 2022 The acoustic scattering characteristics of a target are of great significance to the design of underwater acoustic detection systems. With the improvement in underwater weapon detection ability, the precision and accuracy of underwater target echo ...
Gang Zhao +4 more
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Understanding Ocean Acoustics by Eigenray Analysis [PDF]
Journal of Marine Science and Engineering, 2019 Acoustics is important for all underwater systems for object detection, classification, surveillance systems, and communication. However, underwater acoustics is often difficult to understand, and even the most carefully conducted measurements may often ...
Jens M. Hovem, Hefeng Dong
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Underwater acoustic metamaterials
National Science Review, 2022 Abstract Acoustic metamaterials have been widely investigated over the past few decades and have realized acoustic parameters that are not achievable using conventional materials. After demonstrating that locally resonant acoustic metamaterials are capable of acting as subwavelength unit cells, researchers have evaluated the ...
Erqian Dong +5 more
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A review of underwater acoustic metamaterials for underwater acoustic equipment
Frontiers in Physics, 2022 Researchers use underwater acoustic equipment to explore the unknown ocean environment, which is one of the important means to understand and utilize the ocean. For underwater acoustic equipment, the application of underwater acoustic metamaterials is the premise to ensure and improve the performance of underwater acoustic communication, acoustic ...
Zhenjing Zhu +17 more
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The parametric propagation in underwater acoustics : experimental results [PDF]
, 2012 In underwater acoustics, detection of buried objects in sediments (cables, mines, . . . ) is a complex problem. Indeed, in order to ensure sufficient penetration depth in marine sediments, low frequencies have to be used, implying a low resolution.
BOUTTARD, Etienne +6 more
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Passive tracking in underwater acoustic [PDF]
Signal Processing, 2002 This paper provides a novel passive underwater acoustic method to track a moving object, called a source or target, with the following constraints: the sensor's location is fixed and imposed, and classical array processing techniques cannot be applied.
Xerri, Bernard +2 more
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Anchorless underwater acoustic localization [PDF]
2017 14th Workshop on Positioning, Navigation and Communications (WPNC), 2017 pub
Elizaveta Dubrovinskaya +2 more
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International Journal of Hyperthermia, 2022 Purpose: Test objects for High Intensity Focused Ultrasound (HIFU) are required for the standardization and definition of treatment, Quality Assurance (QA), comparison of results between centers and calibration of devices.
S. Ambrogio +6 more
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Green Underwater Wireless Communications Using Hybrid Optical-Acoustic Technologies
IEEE Access, 2021 Underwater wireless communication is a rapidly growing field, especially with the recent emergence of technologies such as autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs). To support the high-bandwidth applications using these
Kazi Yasin Islam +4 more
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Distinguishing multiple surface ships using one acoustic vector sensor based on a convolutional neural network [PDF]
JASA Express Letters, 2022 A direction of arrival (DOA) estimation method based on a convolutional neural network (CNN) using an acoustic vector sensor is proposed to distinguish multiple surface ships in a selected frequency band.
Huaigang Cao, Qunyan Ren
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