Archives of Acoustics, 46, 4, pp. 657–665, 2021

Identification of Physical Parameters of a Porous Material Located in a Duct by Inverse Methods

Marwa KANI
University of Sfax

University of Sfax

Mohamed TAKTAK
University of Sfax

University of Sfax

Mohamed HADDAR
University of Sfax

Lined ducts with porous materials are found in many industrial applications. To understand and simulate the acoustic behaviour of these kinds of materials, their intrinsic physical parameters must be identified. Recent studies have shown the reliability of the inverse approach for the determination of these parameters. Therefore, in the present paper, two inverse techniques are proposed: the first is the multilevel identification method based on the simplex optimisation algorithm and the second one is based on the genetic algorithm. These methods are used of the physical parameters of a simulated case of a porous material located in a duct by the computation of its acoustic transfer, scattering, and power attenuation. The results obtained by these methods are compared and discussed to choose the more efficient one.
Keywords: porous materials; inverse methods; scattering matrix; acoustic power attenuation
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DOI: 10.24425/aoa.2021.139642