Results 11 to 20 of about 2,739,672 (219)
Advanced Functional Materials, 2022 Owing to the omnipresent noise and crash hazards, multifunctional sound‐absorbing, and deformation‐tolerant materials are highly sought‐after for practical engineering design. However, challenges lie with designing such a material. Herein, leveraging the
Xinwei Li +5 more
semanticscholar +1 more source
Small, 2022 Being a lightweight material with high design freedoms, there are increasing research interests in microlattice metamaterials as sound absorbers. However, thus far, microlattices are limited to one sound dissipation mechanism, and this inhibits their ...
Xinwei Li, Xiang Yu, W. Zhai
semanticscholar +1 more source
Enhanced Low-Frequency Sound Absorption of a Porous Layer Mosaicked with Perforated Resonator
Polymers, 2022 A composite structure composed of a porous-material layer mosaicked with a perforated resonator is proposed to improve the low-frequency sound absorption of the porous layer. This structure is investigated in the form of a porous-material matrix (PM) and
Xin Li, Bilong Liu, Qianqian Wu
semanticscholar +1 more source
Journal of the Korean Wood Science and Technology, 2022 In this study, I used wood pellets as an eco-friendly sound-absorbing material. The aim of the research was to analyze the effect of the filling height of wood pellets on sound absorption.
E. Jang
semanticscholar +1 more source
Anomaly-induced sound absorption in Weyl semimetals [PDF]
Phys. Rev. B 103, 214309 (2021), 2020 We develop a semiclassical theory of sound absorption in Weyl semimetals in magnetic fields. We focus on the contribution to the absorption that stems from the existence of Berry monopoles in the band structure of such materials, or, equivalently, due to the chiral anomaly and chiral magnetic effect. Sound absorption is shown to come primarily from the
arxiv +1 more source
Noise reduction with coupled prismatic tubes [PDF]
, 2000 The present investigation focuses on an accurate description of sound absorption. Within this research a new technique to create sound absorption for a predefined frequency band has been developed. Additionally, a simple and efficient numerical model for
Eerden, Fredericus Joseph Marie van der
core +9 more sources
A hybrid acoustic structure for low-frequency and broadband underwater sound absorption
Journal of Low Frequency Noise Vibration and Active Control, 2022 The underwater anechoic coating with local resonant units is an effective method to achieve low-frequency sound absorption. However, the structure obtained in this way is not satisfactory in the sound absorption effect of mid-high frequency bands ...
Xinyu Jia +4 more
semanticscholar +1 more source
Structural Characteristics and Sound Absorption Properties of Waste Hemp Fiber
Coatings, 2022 In order to realize high-efficiency and high-value recycling of waste hemp fibers, the macromolecular structure, the supramolecular structure, and the morphological structure of waste hemp fibers were investigated by using Fourier transform infrared ...
Duoduo Zhang +3 more
semanticscholar +1 more source
The Absorption of Sound in Gases [PDF]
Science, 1935 Several investigators have shown recently that if the changes in the internal energy of a gas take place so slowly that they cannot follow the adiabatic changes which result when a sound wave passes through the gas, sound dispersion and anomalous absorption of observable magnitudes occur.
openaire +4 more sources
A numerical study of a method for measuring the effective in situ sound absorption coefficient [PDF]
, 2012 The accuracy of a method [Wijnant et al., “Development and applica- tion of a new method for the in-situ measurement of sound absorption”, ISMA 31, Leuven, Belgium (2010).], for measurement of the effective area-averaged in situ sound absorption ...
André de Boer +4 more
core +3 more sources