Results 131 to 140 of about 547 (170)

The Effects of Manufacturing Errors on the Performance of Acoustic Metamaterial Lenses Operating in the MHz Regime. [PDF]

Small Sci
Qin F, Zhang J, Drinkwater BW.
europepmc   +1 more source

Void-Engineered Metamaterial Delay Line with Built-In Impedance Matching for Ultrasonic Applications. [PDF]

Sensors (Basel)
Palanisamy RP, Chavez LA, Castro R, Findikoglu AT.   +3 more
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

An acoustic cloaking design based on topology optimization

Journal of the Acoustical Society of America, 2022
In this work, we explain how to utilize the topology optimization method for the design of acoustic cloaks based on the principle of scattering cancellation. To take account of the challenging fabrication restriction, we impose boundary control inside the optimization objective function and enforce hyperbolic tangent projection to minimize the gray ...
Huang Xun
exaly   +3 more sources

Acoustic cloaking in three dimensions using acoustic metamaterials

Applied Physics Letters, 2007
A scheme to achieve two dimensional (2D) acoustic cloaking is proposed by Cummer and Schurig [New J. Phys. 9, 45 (2007)] by mapping the acoustic equations to Maxwell’s equations of one polarization in the 2D geometry. We find that the acoustic equation can be mapped to the direct current conductivity equation in three dimensions, which then allows the ...
Huanyang Chen, Chan Che Ting, Chen Huanyang   +2 more
exaly   +3 more sources

Cloaking of an acoustic sensor using scattering cancellation

Applied Physics Letters, 2014
In this Letter, a bilaminate acoustic cloak designed using scattering cancellation methods is applied to the case of an acoustic sensor consisting of a hollow piezoelectric shell with mechanical absorption. The bilaminate cloak provides 20–50 dB reduction in scattering strength relative to the uncloaked configuration over the typical range of operation
, Michael R Haberman, Alu Andrea
exaly   +2 more sources

On Acoustic Cloaking Devices by Transformation Media and Their Simulation

SIAM Journal on Applied Mathematics, 2010
By transformation optics, we construct and investigate three-dimensional acoustic cloaking devices for which the device itself and the cloaked region can be mapped into two nested $l^p$-balls ($1\leq ...
Hongyu Liu
exaly   +2 more sources

Acoustic cloaking and transformation acoustics

Journal of Physics D: Applied Physics, 2010
In this review, we give a brief introduction to the application of the new technique of transformation acoustics, which draws on a correspondence between coordinate transformation and material properties. The technique is formulated for both acoustic waves and linear liquid surface waves.
Chen, Huanyang, Chan, Che Ting
openaire   +2 more sources

Remote acoustic cloaks

Frontiers of Physics, 2010
Due to the correspondence of the acoustic equations to Maxwell’s equations of one polarization in two dimensions, we exploit theoretically the acoustic counterpart of the recently proposed remote invisibility cloak. The cloak consists of a circular cylindrical core with designed bulk moduli, and an “anti-object” embedded inside a shell with anisotropic
Qiang Su, Bin Liu, Ji-ping Huang
openaire   +1 more source

Experimental Acoustic Ground Cloak in Air

Physical Review Letters, 2011
We present the design, fabrication, and performance analysis for a class of two-dimensional acoustic cloaking coatings in air. Our approach takes advantage of transformation acoustics and linear coordinate transformations that result in shells which are homogeneous, broadband, and compact.
Bogdan-Ioan, Popa, Lucian, Zigoneanu, Steven A, Cummer   +2 more
openaire   +2 more sources

Cloaking of the momentum in acoustic waves

Physical Review E, 2010
Through an appropriate change in variables, we find that the three-dimensional acoustic wave equation is subject to the transformation media interpretation. In particular, we determine that this interpretation can be extended beyond the pressure difference to also account for the momentum transported by the wave.
openaire   +2 more sources