Sound absorption mechanism, material modification and structural design of various
synthetic fiber materials for industrial noise reduction are reviewed in this paper for the …

The purpose of this paper is to present and discuss a range of in-situ and laboratory
methods can be used to measure the morphological characteristics of porous materials. In …

This work designs a tunable acoustic composite metasurface, with porous material and a
modified microperforated panel (MPP) system. The broadband sound absorption …

This work presents benchmark examples related to the modelling of sound absorbing
porous media with rigid frame based on the periodic geometry of their microstructures. To …

In rods and beams, piezoelectric patches with external circuits have been extensively
studied to dampen structural vibrations at the sound source. This work uses a large flat-layer …

The present paper proposes to investigate the links between the microstructure of
polyurethane foams and their sound absorbing efficiency, and more specifically the effect of …

This article explores the applicability of numerical homogenization techniques for analyzing
transport properties in real foam samples, mostly open-cell, to understand long-wavelength …

Results from a numerical study examining micro-/macrorelations linking local geometry
parameters to sound absorption properties are presented. For a hexagonal structure of solid …

Periodic acoustic structures of rigid micro-rods produced via additive manufacturing were
analyzed using an impedance tube in the 500 Hz–6000 Hz frequency range. The acoustical …

Sound absorption of a polyurethane (PU) foam was predicted for various geometries to
fabricate the optimum microstructure of a sound absorbing foam. Multiscale numerical …