Skip to Main content Skip to Navigation
New interface
Journal articles

Three-dimensional reconstruction of a random fibrous medium: Geometry, transport, and sound absorbing properties

Abstract : The main purpose of this article is to present, within a unified framework, a technique based on numerical homogenization, to model the acoustical properties of real fibrous media from their geometrical characteristics and to compare numerical results with experimental data. The authors introduce a reconstruction procedure for a random fibrous medium and use it as a basis for the computation of its geometrical, transport, and sound absorbing properties. The previously ad hoc " fiber anisotropies " and " volume weighted average radii, " used to describe the experimental data on microstructure, are here measured using scanning electron microscopy. The authors show that these parameters, in conjunction with the bulk porosity, contribute to a precise description of the acoustical characteristics of fibrous absorbents. They also lead to an accurate prediction of transport parameters which can be used to predict acoustical properties. The computed values of the perme-ability and frequency-dependent sound absorption coefficient are successfully compared with per-meability and impedance-tube measurements. The authors' results indicate the important effect of fiber orientation on flow properties associated with the different physical properties of fibrous materials. A direct link is provided between three-dimensional microstructure and the sound absorbing properties of non-woven fibrous materials, without the need for any empirical formulae or fitting parameters.
Complete list of metadata

Cited literature [30 references]  Display  Hide  Download
Contributor : Camille Perrot Connect in order to contact the contributor
Submitted on : Friday, September 1, 2017 - 2:25:12 PM
Last modification on : Thursday, September 29, 2022 - 2:21:15 PM
Long-term archiving on: : Saturday, December 2, 2017 - 12:52:59 PM


Publisher files allowed on an open archive




Hoang Tuan Luu, Camille Perrot, Vincent Monchiet, Raymond Panneton. Three-dimensional reconstruction of a random fibrous medium: Geometry, transport, and sound absorbing properties. Journal of the Acoustical Society of America, 2017, 141 (6), pp.4768 - 4780. ⟨10.1121/1.4989373⟩. ⟨hal-01580012⟩



Record views


Files downloads