Results 41 to 50 of about 2,485,601 (152)
Low-frequency attenuation signal absorption performance of thin-film acoustic metamaterials
Acta AcusticaConsidering that thin film acoustic metamaterials have many special properties that natural materials and traditional materials do not possess, the low-frequency attenuation signal absorption performance of thin film acoustic metamaterials is studied ...
Xu Jingcheng, Chen Changzheng
doaj +1 more source
Journal of Aeronautical Materials, 2023 Acoustic liner is an important component to reduce engine noise. In this work, the modal sound source characteristics of the pipeline under different flow fields were calculated and used as the input boundary for the background flow field calculation and
YANG Zhiyong +7 more
doaj +1 more source
DESAIN OF ACOUSTIC SANDWICH COMPOSITE FROM FOAM CONCRETE AND PALM FIBER
Jurnal Natural, 2018 The purpose of this research were to investigate the influence of palm fiber composition and the number of hole cavities was varied with design Acoustic Sandwich Composite on sound absorption of acoustic panel.
Devya Kartika Devya +2 more
doaj +1 more source
Ultra-broadband acoustic absorber based on periodic acoustic rigid-metaporous composite array
Discover Applied SciencesTo address the increasingly serious issue of noise pollution, we propose an ultra-broadband, wide-angle acoustic absorber based on a periodic acoustic rigid-metaporous composite array.
Dongguo Zhang, Fei Sun, Yichao Liu
doaj +1 more source
Journal of Low Frequency Noise, Vibration and Active ControlThe lateral plates are usually used in the field of structural design of acoustic metamaterials (AMs), which can realize the control of AMs on sound waves. Presently, researches on the application of AMs with lateral plates mainly focus on the regulation
Kangkang Shi +5 more
doaj +1 more source
AIP AdvancesOptimization of acoustic metamaterial structures and prediction of acoustic absorption properties have received much attention in various fields. This thesis aims to optimize and predict the acoustic absorption performance of quasi-Helmholtz acoustic ...
Jianxin Xu +3 more
doaj +1 more source
Acoustic Properties of Multi-Layer Wool Nonwoven Structures
Journal of Natural Fibers, 2020 Wool insulating materials provide good acoustic insulation and are increasingly used for room insulation. These insulating materials are usually produced using nonwoven techniques.
Jan Broda, Marcin Bączek
doaj +1 more source
The potential of date palm midribs-based fabric acoustic panels for sustainable interior design
Ain Shams Engineering Journal, 2023 This paper presents an experimental study of acoustic absorption of novel fabric acoustic panels utilizing non-woven fabric cores and fabric facings made of date palm midribs-fibers; to be used as absorbent panels for spaces with privacy needs.
E.A. Darwish, Mohamad Midani
doaj +1 more source
Field measurements of acoustic absorption in seawater from 38 to 360 kHz.
Journal of the Acoustical Society of America, 2020 Accurate estimates of acoustic absorption in seawater are crucial to the acoustic estimation of aquatic biomass. Estimates of acoustic absorption were obtained via a "pulse-echo" method, implemented using commonly available scientific echosounders and ...
G. Macaulay, D. Chu, E. Ona
semanticscholar +1 more source
A thin multi-order Helmholtz metamaterial with perfect broadband acoustic absorption
Applied Physics Express, 2019 We propose a multi-order Helmholtz metamaterial with deep-subwavelength thickness in which perfect continuous acoustic absorption is achieved within 400 Hz ∼ 2800 Hz. The metamaterial is composed of multiple detuned cells, each of which is constructed by
C. Liu +4 more
semanticscholar +1 more source