Journal
APPLIED MATHEMATICAL MODELLING
Volume 76, Issue -, Pages 330-347Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.apm.2019.05.046
Keywords
Material characterization; Porous materials; Inverse problem; Non-parametric model; Acoustic properties
Funding
- COST (European Cooperation in Science and Technology) through the COST Action [CA15125]
- Xunta de Galicia [EM2013/052]
- European Regional Development Funds (ERDF)
- Spanish Ministerio de Economia y Competitividad [MTM2016-76497-R]
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The acoustic characterization of porous materials with rigid solid frame plays a key role in the prediction of the acoustic behavior of any dynamic system that incorporates them. In order to obtain an accurate prediction of its frequency-dependent response, a suitable choice of the parametric models for each material is essential. However, such models could be inadequate for a given material or only valid in a specific frequency range. In this work, a novel non-parametric methodology is proposed for the characterization of the acoustic properties of rigid porous materials. Unlike most widespread methodologies, this technique is based on the solution of a sequence of frequency-by-frequency well-posed inverse problems, thus increasing the characterization accuracy. Once a reduced number of experimental measurements is available, the proposed method avoids the a priori choice of a parametric model. (C) 2019 Elsevier Inc. All rights reserved.
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