3-D underwater acoustic wave focusing by periodic structure

2019 ◽  
Vol 114 (8) ◽  
pp. 081908 ◽  
Keyword(s):  
Acoustic Wave ◽  
Periodic Structure ◽  
Wave Focusing ◽  
Underwater Acoustic

Laser induced short plane acoustic wave focusing in water

2007 ◽  
Vol 91 (5) ◽  
pp. 051128 ◽  
Author(s):  
Seung H. Ko ◽  
Sang G. Ryu ◽  
Nipun Misra ◽  
Heng Pan ◽  
Costas P. Grigoropoulos ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Wave Focusing ◽  
Plane Acoustic Wave

scholarly journals 3D sound wave focusing by 2D internal periodic structure of 3D external cuboid shape

2019 ◽  
Vol 15 ◽  
pp. 102582 ◽  
Author(s):  
S. Castiñeira-Ibáñez ◽  
D. Tarrazó-Serrano ◽  
P. Candelas ◽  
O.V. Minin ◽  
C. Rubio ◽  
...  
Keyword(s):  
Periodic Structure ◽  
Sound Wave ◽  
Wave Focusing ◽  
3D Sound

Surface Acoustic Wave Focusing and Induced Rayleigh Waves

1995 ◽  
Vol 74 (14) ◽  
pp. 2729-2732 ◽  
Author(s):  
R. E. Vines ◽  
Shin-ichiro Tamura ◽  
J. P. Wolfe
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Rayleigh Waves ◽  
Wave Focusing

scholarly journals A Composite Perforated Partitioned Sandwich Panel With Corrugation for Underwater Low-Frequency Sound Absorption

2021 ◽  
Vol 7 ◽  
Author(s):  
Junyi Wang ◽  
Jiaming Hu ◽  
Yun Chen
Keyword(s):  
Acoustic Wave ◽  
Composite Structure ◽  
Sound Absorption ◽  
Low Frequency ◽  
Propagation Loss ◽  
Sound Waves ◽  
Acoustic Metamaterials ◽  
Underwater Sound ◽  
Underwater Acoustic ◽  
Frequency Sound

Underwater acoustic wave absorption and control play an important role in underwater applications. Various types of underwater acoustic metamaterials have been proposed in recent years with the vigorous development of acoustic metamaterials. Compared with airborne sound, underwater sound waves have a longer wavelength and much smaller propagation loss, making them more difficult to control. In addition, given that the acoustic impedance of water is much greater than that of air, numerous conventional materials and structures are not suited to underwater use. In this paper, we propose a composite structure based on an excellent broadband low-frequency sound absorber of air using aluminum mixed with rubber. Our composite structure possesses broadband low-frequency (<1,000 Hz) sound absorption underwater, omnidirectional high sound absorption coefficient under the oblique incidence (0–75°), and pressure resistance. It has promising applications for underwater acoustic wave control and contributes to the design of underwater acoustic metamaterials.

Acoustic energy transport based on the local state characteristics of a symmetric interface

2020 ◽  
Vol 34 (31) ◽  
pp. 2050308
Author(s):  
Shuai Tang ◽  
Jianning Han
Keyword(s):  
Acoustic Wave ◽  
Periodic Structure ◽  
Energy Transport ◽  
Hexagonal Lattice ◽  
Local State ◽  
Acoustic Energy ◽  
High Tech ◽  
Rotation Symmetry ◽  
One Dimensional ◽  
Directional Transmission

To explore the directional transmission channel that can efficiently transport acoustic energy, we analyzed the local state characteristics of a mirror symmetric interface (MSI) in an artificial periodic structure. It was found that in a one-dimensional (1D) waveguide structure with alternating high- and low-resonant units, the acoustic energy can be localized at the symmetric interface. The result can be extended to a 2D waveguide array, implying that the acoustic energy can be transported efficiently along the interface. In addition, to improve the robustness of the acoustic system, we designed a graphene-like periodic structure based on a hexagonal lattice. By breaking the six-fold rotation symmetry of the structure, the topological interface was constructed, and the backscattering of the acoustic wave was effectively suppressed, enabling the acoustic wave energy to be transported with low reflection even in the curved waveguide. These results may provide a new direction for the realization of high-tech applications such as micromotor and 2D integrated communication.

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