Results 61 to 70 of about 3,581 (229)
Controller architectures for optimum performance in practical active acoustic metamaterials [PDF]
, 2012 Over the last decade there has been significant interest in the design and production of acoustic metamaterials with physical qualities not seen in naturally occurring media.
Gao, Yan +3 more
core
Acoustic metamaterial design for aeronautical purposes [PDF]
, 2023 Labyrinth-shape quarter wavelength tubes are numerically studied under plane wave excitation, with analytical comparison. These labyrinth resonators (LRs) are tuned at 60, 90 and 120 Hz, and their sound absorption response exhibits maximum peak at those ...
Giuseppe Catapane
core +1 more source
Optimization design of the acoustic metamaterial based on the co-simulation method
AIP Advances, 2022 Once the structure of a metamaterial is fixed, it has the property of controlling elastic waves in a fixed frequency range. To obtain a metamaterial with an optimal structure, a co-simulation optimization method is proposed in this paper to optimize the ...
Bingfei Liu, Fuxing Chen
doaj +1 more source
Advanced Materials, EarlyView.We present SCIENCE, an in‐ear multimodal physiological monitor featuring two key innovations. Water‐triggered morphological expansion (a 2‐mm cylinder to a 9‐mm spindle) achieves conformal adaptation across complex canal geometries. Simultaneously, active biofouling mitigation disrupts cerumen barriers, reducing sensor‐skin impedance by 20%.
Shuyun Zhuo +3 more
wiley +1 more source
Active elastic metamaterials with applications in vibration and acoustics [PDF]
, 2012 Elastic metamaterials provide a new approach to solving existing problems in vibration and acoustics. They have also been associated with novel concepts such as acoustic invisibility and subwavelength imaging.
Laalej, Hatim +3 more
core
A programmable nonlinear acoustic metamaterial [PDF]
, 2017 Acoustic metamaterials with specifically designed lattices can manipulate acoustic/elastic waves in unprecedented ways. Whereas there are many studies that focus on passive linear lattice, with non-reconfigurable structures.
Eoin Clerkin +7 more
core +1 more source
Acoustic jet based on acoustic metamaterial
, 2021 In this paper, a novel gradient index (GRIN) acoustic metamaterial is proposed based on the concept of optical modified generalized Luneburg lens (MGLL). With the MGLL, double-foci and high energy density between the two foci can be achieved, which enables the realization of an ultra-long acoustic jet between the two foci.
Zhao, Liuxian +2 more
openaire +2 more sources
Advanced Materials Technologies, EarlyView.A strain‐activated mechanical metamaterial is developed to achieve programmable dual‐phase stiffness through an intrinsic geometric locking mechanism. Finite element modeling and parametric analysis identify the key design parameters governing activation strain, stiffness transition, and energy absorption.
Ramin Yousefi‐Nooraie +3 more
wiley +1 more source
Acoustic metamaterial design and applications [PDF]
, 2010 The explosion of interest in metamaterials is due to the dramatically increased manipulation ability over light as well as sound waves. This material research was stimulated by the opportunity to develop an artificial media with negative refractive index
Zhang, Shu
core
Broadband Acoustic Hyperbolic Metamaterial
Physical Review Letters, 2015 Acoustic metamaterials (AMMs) are engineered materials, made from subwavelength structures, that exhibit useful or unusual constitutive properties. There has been intense research interest in AMMs since its first realization in 2000 by Liu et al. A number of functionalities and applications have been proposed and achieved using AMMs.
Shen, Chen +5 more
openaire +4 more sources