The performance of a sound absorber is typically characterised by the absorption coefficient as a function of the depth of the absorber in relation to the acoustic wavelength, \(\lambda \). For absorptive foams such as polyurethane or melamine foams, depths of between \(\lambda \) and \(\...
SeMSA: a compact super absorber optimised for broadband, low-frequency noise attenuation.The attenuation of low-frequency broadband noise in a light, small form-factor is an intractable challenge. In this paper, a new technology is presented which employs the highly efficient visco-thermal loss ...
The internal ring in layer II can greatly affect the performance of this absorber. In the high-frequency bands, the internal ring sways the huge reflectivity, producing a strong reflection effect similar to that of a copper plane. Therefore, the internal ring plays a decisive role in ...
The performance of the absorber was simulated as a function of its geometric parameters and the angle of incident beam as well. The results are discussed in terms of localized surface plasmonic resonance mechanism and dispersion effect of TiN, and the absorption features are qualitatively explained ...
The proposed work is very compact (unit cell size: 0.22 位0) with ultrathin substrate height (0.07 位0) and giving RAB performance of 54.51% comparable with that of others. Thus with this single-layer low-cost substrate material a broadband absorber is achieved....
An ultra-broadband and lightweight structural absorber based on a mixture absorbent composed of carbon nanotubes (CNTs) and carbon black has been proposed here. The absorber adopts a low surface density double frame structure design. In order to improve the microwave absorption performance to cope ...
In comparison with porous materials of the same thickness, this composite sound absorber significantly enhances its low-frequency absorption performance. Introduction Noise pollution has been recognized as one of the four major pollutants in contemporary society. People who live or work in environments ...
These PAs, enabled by plasmonic resonance, are typically powerful and compact, but confr... TA Chen,MJ Yub,YJ Lu,... - 《Scientific Reports》 被引量: 0发表: 2021年 An ultra-broadband, polarization and angle-insensitive metamaterial light absorber We propose a new ultra-broadband metamaterial...
Metamaterials have enabled the design of electromagnetic wave absorbers with unprecedented performance. Conventional metamaterial absorbers usually employ multiple structure components in one unit cell to achieve broadband absorption. Here, a simple metasurface microwave absorber is proposed that has one metal-...
A high-performance ultra-compact plasmonic metamaterial structure for optical THz absorption Article Open access 08 November 2024 Achieving near-perfect light absorption in atomically thin transition metal dichalcogenides through band nesting Article Open access 01 July 2023 Ultra-broadband, lithography...