Results 21 to 30 of about 2,768,062 (267)
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
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
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
Study of the Sound Absorption Performance of Ethylene-Vinyl Acetate Foam Materials
Medžiagotyra, 2019 Ethylene-Vinyl Acetate (EVA) polymer foam was prepared using a mold for this investigation. The effect of the cell structure parameters and pore filling gas type on the sound absorption performance of the EVA foam materials were analyzed in terms of ...
Wei GONG +5 more
doaj +1 more source
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
e-Polymers, 2020 Porous material (PM) shows good sound absorption performance, however, the sound absorbing property of PM with different parameters are greatly different.
Wang Yonghua +5 more
doaj +1 more source
Investigation of the sound absorption properties of gypsum particleboard produced with kenaf stalks and nano clay [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2014 In this study sound absorption coefficient and hardness of gypsum particleboard produced with kenaf stalk and nano clay were investigated. Variables in this study were weight ratio of kenaf stalks to poplar wood in three levels (40, 50 and 60 %) and nano
Hossein Rangavar, Mohammad hassan Payan
doaj +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
Sound absorption by clamped poroelastic plates [PDF]
, 2008 Measurements and predictions have been made of the absorption coefficient and the surface acoustic impedance of poroelastic plates clamped in a large impedance tube and separated from the rigid termination by an air gap.
Attenborough K. +4 more
core +1 more source