Results 31 to 40 of about 2,768,062 (267)
Nihon Kikai Gakkai ronbunshu, 2016 In this paper, we report the use of sound-absorbing materials, specifically sound-absorbing structures of bundled rice straws, that are oblique arranged incident to the sound waves.
Shuichi SAKAMOTO +3 more
doaj +1 more source
Nonlocal acoustic metasurface for ultrabroadband sound absorption
Physical review B, 2021 Classical meta-absorber designs usually have a tradeoff between bandwidth, efficiency, and thickness. Here, we introduce the concept of a nonlocal acoustic metasurface absorber by using a bridge structure connecting resonating unit cells to improve the ...
Yifan Zhu +5 more
semanticscholar +1 more source
Development of biodegradable composite micro-perforated panel made from natural fibre composites with evaluation of its acoustic and mechanical properties [PDF]
, 2020 Micro-perforated panel (MPP) has been widely considered as a promising alternative for sound absorption purposes. Plenty of research has been done to improve the sound absorption of MPP but no specific work highlights the material structure effect ...
Chin, Desmond Daniel Vui Sheng
core
Sound absorption property of openpore aluminum foams [PDF]
China Foundry, 2007 This paper presents a study on sound absorption property of aluminum foam by evaluating its sound absorption coefficients using standing wave tube method. Experimental results showed that the average values of sound absorption coefficients (over the test
WANG Fang, WANG Lu-cai, WU Jian-guo
doaj
Forget metamaterial: It does not improve sound absorption performance as it claims [PDF]
arXiv, 2023 The term `sub-wavelength' is commonly used to describe innovative sound-absorbing structures usually labeled as `metamaterials'. Such structures, however, inherently do not bring groundbreaking advancements. This study addresses the limitations imposed by the thickness criterion of Yang et al.
arxiv
Acoustic contributions of a sound absorbing blanket placed in a double panel structure: Absorption Versus Transmission [PDF]
The Journal of the Acoustical Society of America 128, 2 (2010) 8, 2010 The objective of this paper is to propose a simple tool to estimate the absorption vs. transmission loss contributions of a multilayered blanket unbounded in a double panel structure and thus guide its optimization. The normal incidence airborne sound transmission loss of the double panel structure, without structure-borne connections, is written in ...
arxiv +1 more source
Journal of Low Frequency Noise, Vibration and Active Control, 2022 Since the development of advanced sound absorption material is highly critical in noise control applications, anechoic coatings, and acoustic metamaterials, both fabrication technology and structure design are significant in the achievement of broadband ...
Longgui Peng +4 more
doaj +1 more source
Sound absorption properties of wood-based pulp fibre foams
Cellulose, 2021 In this study, sound absorbing materials were produced through foam forming technique using hardwood and softwood pulps with varying chemical composition, ultrastructural, and morphological properties as raw materials.
Jose Cucharero +4 more
semanticscholar +1 more source
Utilizing Agricultural Waste Materials for the Development of Sustainable Sound Absorption Materials [PDF]
Nature Environment and Pollution TechnologyEnvironmental pollution is escalating due to inadequate waste management, with the open burning of agricultural waste being a significant contributor. This process releases various harmful gases into the environment.
Venkatesan B., Kannan V., Raja Priya P. and Karthiga Shenbagam N
doaj +1 more source
Sound Absorption Properties of Natural Fibers: A Review
Sustainability, 2020 In recent years, in an attempt to substitute the conventional synthetic sound absorption material, natural fibers and their sound absorption properties have been increasingly studied.
Tao Yang +6 more
semanticscholar +1 more source