Journal ArticleDOI
Predicting the sound absorption of natural materials: Best-fit inverse laws for the acoustic impedance and the propagation constant
Umberto Berardi,Gino Iannace +1 more
TLDR
In this article, an inverse method to predict the acoustical properties of nine natural fibers (kenaf, wood, hemp, coconut, straw, and granular cork) is presented.About:
This article is published in Applied Acoustics.The article was published on 2017-01-01. It has received 162 citations till now. The article focuses on the topics: Acoustic impedance.read more
Citations
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Investigation of the acoustic and mechanical properties of homogenous and hybrid jute and luffa bio composites
TL;DR: In this paper, the design and development of new biomaterials has become a necessity due to adverse effects of chemical materials on people and nature, as the mechanical properties of biom materials are not as good as those of natural materials.
Journal ArticleDOI
Angle-Dependent Absorption of Sound on Porous Materials
TL;DR: In this article, angle-dependent absorption coefficients were measured in a factory-type setting and the results confirmed that the materials have different attenuation behavior to sound waves coming from different directions and that the results were in good agreement with sound absorption coefficients measured for comparison in a reverberation room and in an impedance tube.
Journal ArticleDOI
An Evaluation on Acoustic Behavior of Untreated Tree Trunks Depending on Bark Physical Properties and Fiber Cell Structure
TL;DR: In this article, the authors focused on determining the sound absorption coefficients (SACs) of untreated t and found that noise pollution generated by increasing global urbanization has become an important issue.
Journal ArticleDOI
Sustainable Rigid Polyurethane Foam from Wasted Palm Oil and Water Hyacinth Fiber Composite—A Green Sound-Absorbing Material
TL;DR: PUF derived from both water hyacinth and used palm oil could be a promising green alternative material for sound-absorbing applications.
Journal ArticleDOI
The Preparation and Characterization of Polyurethane Foam with Coconut Oil Polyol and Rapeseed Oil Polyol
Fang Liu,Shuming Chen +1 more
TL;DR: In this paper, the authors dedicates on the synthesis of polyurethane (PU) using rapeseed oil polyol, coconut oil polyols, and petroleum polyol by one step procedure.
References
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Journal ArticleDOI
Acoustical properties of fibrous absorbent materials
M.E. Delany,E.N. Bazley +1 more
TL;DR: In this article, the authors investigated the acoustical properties of a range of fibrous absorbent materials and showed that the characteristic impedance and propagation coefficient of these materials normalize as a function of frequency divided by flow-resistance.
Journal ArticleDOI
Generalized Theory of Acoustic Propagation in Porous Dissipative Media
TL;DR: In this article, the authors extended the theory of acoustic propagation in porous media to include anisotropy, viscoelasticity, and solid dissipation, and a more refined analysis of the relative motion of the fluid in the pores is also developed by introducing the concept of viscodynamic operational tensor.
Journal ArticleDOI
Life cycle assessment of building materials: Comparative analysis of energy and environmental impacts and evaluation of the eco-efficiency improvement potential
TL;DR: In this article, the authors present the results of an LCA study comparing the most commonly used building materials with some eco-materials using three different impact categories, and propose guidelines for materials selection in the eco-design of new buildings and rehabilitation of existing buildings.
Journal ArticleDOI
Acoustical Properties of porous materials : Modifications of Delany-Bazley models
TL;DR: In this article, the characteristic impedance and propagation constant of porous materials are discussed from a viewpoint of physical realizability, and new regression models based on experimental data by Delany and Bazley are derived.
Related Papers (5)
Acoustic characterization of natural fibers for sound absorption applications
Umberto Berardi,Gino Iannace +1 more