Gradient-index phononic crystals for omnidirectional acoustic wave focusing and energy harvesting

2020 ◽  
Vol 116 (23) ◽  
pp. 234101
Author(s):  
Jaeyub Hyun ◽  
Choon-Su Park ◽  
Jiho Chang ◽  
Wan-Ho Cho ◽  
Miso Kim
Keyword(s):  
Energy Harvesting ◽  
Acoustic Wave ◽  
Phononic Crystals ◽  
Gradient Index ◽  
Wave Focusing

Gradient-index phononic crystals for highly dense flexural energy harvesting

2019 ◽  
Vol 115 (17) ◽  
pp. 173901 ◽  
Author(s):  
Jaeyub Hyun ◽  
Wonjae Choi ◽  
Miso Kim
Keyword(s):  
Energy Harvesting ◽  
Phononic Crystals ◽  
Gradient Index

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

Acoustic wave frequency filtering in constant total length phononic crystals of Al/Pb multilayer

2021 ◽  
Author(s):  
Chittaranjan Nayak ◽  
Mehdi Solaimani ◽  
Alireza Aghajamali ◽  
Arafa H. Aly
Keyword(s):  
Acoustic Wave ◽  
Phononic Crystal ◽  
Phononic Crystals ◽  
Geometrical Parameters ◽  
One Dimensional ◽  
Internal Geometry ◽  
Total Length ◽  
Acoustic Filters ◽  
System Length ◽  
Phononic Band Gaps

In this study, we have scrutinized the frequency gap generation by changing the geometrical parameters of a one-dimensional phononic crystal. For this purpose, we have calculated the transmission coefficient of an incident acoustic wave by using the transfer matrix method. We have retained and fixed the total length of the system and changed the system internal geometry not to increase the system length too much. Another reason was to adjust the phononic band gaps and get the desired transmission properties by finding the optimum internal geometry without increasing or decreasing the total length of phononic crystals. In addition, we also propose few structures with the opportunity of applications in acoustical devices such as sonic reflectors. Our results can also be of high interest to design acoustic filters in the case that transmission of certain frequencies is necessary.

scholarly journals Design of acoustic beam aperture modifier using gradient-index phononic crystals

2012 ◽  
Vol 111 (12) ◽  
pp. 123510 ◽  
Author(s):  
Sz-Chin Steven Lin ◽  
Bernhard R. Tittmann ◽  
Tony Jun Huang
Keyword(s):  
Phononic Crystals ◽  
Gradient Index ◽  
Acoustic Beam ◽  
Beam Aperture

Structurally embedded reflectors and mirrors for elastic wave focusing and energy harvesting

2017 ◽  
Vol 122 (16) ◽  
pp. 164503 ◽  
Author(s):  
S. Tol ◽  
F. L. Degertekin ◽  
A. Erturk
Keyword(s):  
Energy Harvesting ◽  
Elastic Wave ◽  
Wave Focusing

Acoustic mirage in two-dimensional gradient-index phononic crystals

2009 ◽  
Vol 106 (5) ◽  
pp. 053529 ◽  
Author(s):  
Sz-Chin Steven Lin ◽  
Tony Jun Huang
Keyword(s):  
Phononic Crystals ◽  
Gradient Index ◽  
Two Dimensional
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