Results 11 to 20 of about 6,322,023 (276)

The scattering of sound waves in two-dimensional ducts with discontinuities in height and material property [PDF]

open access: yes, 1999
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Eigen-mode matching techniques offer a versatile approach for solving acoustic scattering problems in ducts.
Warren, Daniel
core   +7 more sources

Computational modelling of acoustic scattering of a sound source in the vicinity of the ground [PDF]

open access: yes, 2009
The paper presents a computational model for acoustic scattering of a near-the- ground sound source around a body moving in a uniform flow. Using the method of images and the concept of reflection coefficient, the half space Green's function in a ...
Pantazopoulou, Panagiota   +1 more
core   +7 more sources

Acoustic scattering properties of underwater corner reflector complexes

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectiveIn order to further improve the speed and accuracy of calculating the acoustic scattering fields of underwater concave targets, the acoustic scattering characteristics of underwater corner reflector complexes are studied.
Pengcheng CHAI   +4 more
doaj   +1 more source

Modulation Mechanism of Acoustic Scattering in Underwater Corner Reflectors with Acoustic Metasurfaces

open access: yesArchives of Acoustics, 2023
Using the tunderwater corner reflector (CR) to simulate the acoustic scattering characteristics of the military target is a new technology to counter active sonar detection.
Jiaman DU   +5 more
doaj   +1 more source

Similarity Study of Electromagnetic and Underwater Acoustic Scattering by Three-Dimensional Targets in Unbounded Space

open access: yesJournal of Marine Science and Engineering, 2023
The characterization of targets by electromagnetic (EM) scattering and underwater acoustic scattering is an important object of research in these two related fields. However, there are some difficulties in the simulation and measurement of the scattering
Jie Wang   +4 more
doaj   +1 more source

Research Progress of Locally Resonance Acoustic Metamaterials [PDF]

open access: yesE3S Web of Conferences, 2021
Bragg scattering phonon crystal and locally resonant acoustic metamaterials were introduced. In order to generate noise reduction, the lattice constant of Bragg scattering phonon crystal should be of the same order of magnitude as the wave length of the ...
Zhehua Du
doaj   +1 more source

Underwater Spherical Shell Classification and Parameter Estimation Based on Acoustic Backscattering Characteristics

open access: yesIEEE Access, 2021
Underwater quiet object detection and recognition by the target echo method is based on prediction and cognition of acoustic scattering characteristics.
Tianyang Xu, Xiukun Li, Hongjian Jia
doaj   +1 more source

Exploring the underlying mechanism of acoustic radiation force on a sphere in a fluid-filled rigid tube

open access: yesAIP Advances, 2021
The propagation of sound waves in a fluid-filled rigid tube has potential application in acoustic particle-positioning, valuable reagent recovery, and noninvasive manipulation of targets.
Jingyao Shi   +3 more
doaj   +1 more source

An Open Access Chamber Designed for the Acoustic Characterisation of Microbubbles

open access: yesApplied Sciences, 2022
Microbubbles are used as contrast agents in clinical ultrasound for Left Ventricular Opacification (LVO) and perfusion imaging. They are also the subject of promising research in therapeutics as a drug delivery mechanism or for sonoporation and co ...
Elliott Smith   +8 more
doaj   +1 more source

Non-Rayleigh Acoustic Scattering Characteristics of Individual Fish and Zooplankton [PDF]

open access: yesIEEE Journal of Oceanic Engineering, 2004
It has long been known that the statistical properties of acoustic echoes from individual fish can have non-Rayleigh characteristics. The statistical properties of echoes from zooplankton are generally less understood. In this study, echoes from individual fish and zooplankton from a series of laboratory measurements from the past decade are ...
Stanton, Timothy K.   +2 more
openaire   +3 more sources

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