Results 1 to 10 of about 722,836 (166)

Simplified Target Strength Analysis Procedure of an Underwater Vehicle Considering Target Strength Absorbing Materials

Journal of Marine Science and Engineering
Target strength (TS) is an important design factor for improving the survivability of an underwater vehicle, and various efforts are ongoing to enhance it.
Jangwoo Kim, Jaeman Kim, Joo-Yeob Lee, Dae-Seung Cho, Sung-Ju Park, Kyungjun Song, Yun-ho Shin, Kookhyun Kim   +7 more
doaj   +4 more sources

Investigation and Numerical Simulation of the Acoustic Target Strength of the Underwater Submarine Vehicle

Inventions, 2022
Modern weapon systems’ survival hinges on their detection capabilities more than anything else. In the active sonar equation, the acoustic target strength is crucial.
Kaveripakam Sathish, Rajesh Anbazhagan, Ravikumar Chinthaginjala Venkata, Fabio Arena, Giovanni Pau   +4 more
doaj   +3 more sources

The relationship between target strength frequency response and vertical swim velocity: a new approach for fish discrimination

Aquatic Living Resources, 2021
In-situ identification of fish species using acoustic methods is a key issue for fisheries research and ecological applications. We propose a novel approach to fish discrimination based on the relationship between target strength frequency response (TS(f)
Homma Hikaru, Ostrovsky Ilia
doaj   +1 more source

GPU-Accelerated Target Strength Prediction Based on Multiresolution Shooting and Bouncing Ray Method

Applied Sciences, 2022
The application of the traditional planar acoustics method is limited due to the low accuracy when computing the echo characteristics of underwater targets. Based on the concept of the shooting and bouncing ray which considers multiple reflections on the
Gang Zhao, Naiwei Sun, Shen Shen, Xianyun Wu, Li Wang   +4 more
doaj   +1 more source

Optimum design of acoustic stealth shape of underwater vehicle model with conning tower

Frontiers in Physics, 2023
We present an optimization algorithm for achieving optimal acoustic stealth performance during designing an underwater vehicle shape in the free field using COMSOL-MATLAB integrated software.
Yuhang Tang, Xueren Wang, Xuhong Miao, Shengyao Gao, Bing Li, Zilong Peng, Zilong Peng   +6 more
doaj   +1 more source

Active Control of the Reflection Coefficient of an Underwater Surface

Acoustics, 2023
From a strategic point of view, it is essential to protect underwater vehicles from being detected by opponents. Modern mono- or bistatic sonar systems are capable of precisely determining the position of a watercraft.
Johannes Timmermann, Norbert Hövelmann, Delf Sachau   +2 more
doaj   +1 more source

Broadband Scattering Characteristic Quantization Technique for Single Fish Based on a Split-Beam Echosounder

Fishes, 2023
The utilization of broadband quantization data increases the possibility of practical applications for fish target recognition based on the acoustic scattering theory.
Qiuming Ai, Haisen Li, Jin Yao, Chao Li, Jiangping Tao   +4 more
doaj   +1 more source

Fish Stock Status Assessment in Alue Naga Waters Using A 200 Khz Single Beam Echosounder

Ilmu Kelautan, 2023
Monitoring fish stocks is an important part of sustainable management of fisheries resources. Conducting the current evaluation is very difficult since there are no reliable data on the potential for fisheries in the waters surrounding Banda Aceh city ...
Syahrul Purnawan, Sofyatuddin Karina, Myounghee Kang, Henry Manik   +3 more
doaj   +1 more source

Target strengths of Antarctic krill [PDF]

The Journal of the Acoustical Society of America, 1989
Encaged aggregations of Euphausia superba have been ensonified at 38 and 120 kHz and the echo energy measured. Derived estimates of target strength are considerably lower than previously measured values.
K. G. Foote, I. Everson, D. G. Bone, J. L. Watkins   +3 more
openaire   +1 more source

A Study of Combined Graphical Acoustic Computing and the Depth Peeling Technique on Acoustic Backscattering of Multiple-Layered Structures

Journal of Marine Science and Engineering, 2023
An efficient graphical acoustic computing (GRACO) method is introduced. Referring to the rendering of semi-transparent objects, the depth peeling (DP) technique is compounded with the GRACO method, forming a combined GRACO and DP method (GRACO–DP) to ...
Yang Zhang, Qiang Gui, Yuzheng Yang, Wei Li   +3 more
doaj   +1 more source