Conveners
A10.05/A16.11 Advanced Characterization of Acoustic Materials: S064
- Luc Jaouen
- Mélanie Nolan (Universidad Politécnica de Madrid)
A10.05/A16.11 Advanced Characterization of Acoustic Materials: S356
- Mélanie Nolan (Universidad Politécnica de Madrid)
- Luc Jaouen
A10.05/A16.11 Advanced Characterization of Acoustic Materials: P481
- Mélanie Nolan (Universidad Politécnica de Madrid)
- Luc Jaouen
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Arif Onur Yurek (Aalto University)09/09/2026, 09:00A10 Materials and Metamaterials
Leading-edge diffraction and early scattering from finite-sized rigid, porous, and perforated plates under grazing incidence are investigated using dense planar measurements obtained with a moving-microphone array. A signal-subtraction approach is employed to isolate sample-induced contributions in the upstream region, where specular reflections are negligible and time-domain windowing is not...
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Elio Di Giulio (University of Naples Federico II)09/09/2026, 09:20A10 Materials and Metamaterials
Porous materials are widely used in acoustic and thermoacoustic applications due to their ability to dissipate acoustic energy through viscous and thermal interactions between the fluid and the solid skeleton. These mechanisms are commonly described by visco-thermal parameters such as the viscous resistance and the thermal relaxation conductance, which play a central role in equivalent fluid...
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Daniel Urbán (Slovak University of Technology)09/09/2026, 09:40A10 Materials and Metamaterials
This contribution summarizes the results of multi-year research focused on the integration of biobased blown-in insulation materials, such as straw and cellulose, into building structures, with an emphasis on their acoustic properties. Although initial studies confirmed the environmental sustainability and satisfactory sound reduction index of these constructions, they simultaneously revealed...
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Andrea Santoni (University of Ferrara)09/09/2026, 10:20A10 Materials and Metamaterials
Open-cell polyurethane (PU) foams are widely utilised for acoustic insulation in the automotive and industrial sectors; however, the foaming process often introduces significant spatial non-homogeneity and anisotropy. This variability complicates the prediction of macroscopic performance via standard semi-phenomenological models, such as the Johnson-Champoux-Allard (JCA) framework. This study...
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Arthur Givois (Université de technologie de Compiègne)09/09/2026, 10:40A10 Materials and Metamaterials
This study is concerned with the nonlinear characterization of thin membranes undergoing large vibrations under high acoustic loads, designed for noise mitigation application based on the nonlinear energy sink principle. An experimental vibroacoustic setup is equipped to prescribe high pressure levels to circular thin samples and accurately measure their amplitude-dependent behaviors. This is...
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Juan Díaz Carabias (Microflown Technologies)09/09/2026, 11:00A10 Materials and Metamaterials
This paper presents a novel indirect methodology for the characterization of fibrous sound-absorbing materials based on in-situ acoustic impedance measurements. The proposed approach relies on the combined measurement of sound pressure and particle velocity to estimate the surface acoustic impedance of the sample under test, enabling material characterization directly in realistic measurement...
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mohammad morovati (Université Le Havre Normandie)09/09/2026, 11:20A10 Materials and Metamaterials
Porous materials are widely used for sound absorption, yet their acoustic performance can be significantly altered by the presence of liquid water. The effect of overall moisture content on the acoustic properties of porous and granular media has already been investigated, almost through experimental approaches. However, the spatial distribution of water introduced by capillary rise altering...
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Guillermo Rey-Gozalo (Universidad de Extremadura)09/09/2026, 15:00A10 Materials and Metamaterials
Cigarette filters constitute a significant fraction of persistent urban waste, raising growing environmental concerns due to their widespread disposal and limited recycling pathways. In this context, their potential reuse as porous materials for acoustic applications have attracted increasing attention.This work explores the role of different binding agents in the development of acoustic...
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Maria Miranda Vuin (Tallinn University of Technology)09/09/2026, 15:00A10 Materials and Metamaterials
Wool felt is a fibrous material composed of randomly oriented and mechanically entangled elastic fibres. Despite its widespread use in acoustic engineering, the sound absorption mechanisms of wool felt remain insufficiently understood. In this study, a Biot-Johnson-Champoux-Allard-Lafarge (Biot-JCAL) poroelastic modelling approach is employed, in which the felt is represented as an equivalent...
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Florian Kraxberger (Graz University of Technology)09/09/2026, 15:00A10 Materials and Metamaterials
The accurate characterisation of the acoustic and elastic parameters of a porous material based on impedance tube measurements presents challenges, in particular, because the specimens’ diameters can deviate from the nominal inner diameter of the impedance tube. If the specimen’s diameter exceeds the nominal diameter of the tube, it is compared and therefore the material parameters are...
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