An experimental investigation into active structural acoustic cloaking of a flexible cylinder

C House, J Cheer, S Daley - Applied Acoustics, 2020 - Elsevier
The ability to acoustically cloak an object, effectively making the object acoustically invisible
to an outside observer, is of interest in many applications where the presence of an object …

Antiplane elastic wave cloaking using metamaterials, homogenization and hyperelasticity

WJ Parnell, T Shearer - Wave Motion, 2013 - Elsevier
We consider the problem of how to cloak objects from antiplane elastic waves using two
alternative techniques. The first is the use of a layered metamaterial in the spirit of the work …

[HTML][HTML] Bounds on Herglotz functions and fundamental limits of broadband passive quasistatic cloaking

M Cassier, GW Milton - Journal of Mathematical Physics, 2017 - pubs.aip.org
Using a sum rule, we derive new bounds on Herglotz functions that generalize those given
in Bernland et al.[J. Phys. A: Math. Theor. 44 (14), 145205 (2011)] and Gustafsson and …

Active cloaking of inclusions for flexural waves in thin elastic plates

J O'Neill, Ö Selsil, RC McPhedran… - … Quarterly Journal of …, 2015 - academic.oup.com
We present a new method to create an active cloak for a single clamped inclusion in a
Kirchhoff plate in the presence of flexural waves. In order to cloak this inclusion, we place …

Active elastodynamic cloaking

AN Norris, FA Amirkulova… - … and Mechanics of …, 2014 - journals.sagepub.com
An active elastodynamic cloak destructively interferes with an incident time harmonic in-
plane (coupled compressional/shear) elastic wave to produce zero total elastic field over a …

Active noise cloaking of 2D cylindrical shells

D Eggler, H Chung, F Montiel, J Pan, N Kessissoglou - Wave Motion, 2019 - Elsevier
Active noise cloaking of rigid and elastic 2D cylindrical shells in an infinite acoustic medium
is presented. The control approach utilises control sources or forces and discrete error …

The gradient of total multiple scattering cross-section and its application to acoustic cloaking

FA Amirkulova, AN Norris - Journal of Theoretical and …, 2020 - World Scientific
We derive a formula for the gradients of the total scattering cross-section (TSCS) with
respect to positions of a set of cylindrical scatterers. The analytic form enhances modeling …

[HTML][HTML] Active cloaking of flexural waves in thin plates

G Futhazar, WJ Parnell, AN Norris - Journal of Sound and Vibration, 2015 - Elsevier
An active cloak consists of a set of discrete multipole sources distributed in space. When the
source positions and amplitudes are carefully specified the active field destructively …

[HTML][HTML] Active acoustic cloaking of cylindrical shells in low Mach number flow

B Kerferd, D Eggler, M Karimi… - Journal of Sound and …, 2020 - Elsevier
The vibro-acoustic response of a two-dimensional cylindrical shell in low Mach number flow
is herein derived. The analytical model takes into account the structural elasticity and …

Manipulation of acoustic wave scattering from cylindrical shells using a coating of FG magneto-electro-elastic composite materials: Active acoustic cloaking

A Tarkashvand, K Daneshjou - Wave Motion, 2023 - Elsevier
Acoustically cloaking an object from view of a system that uses acoustic waves for detection
is an attractive and practical capability. The aim of the current investigation is to hide a steel …