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Determining Planar Multiple Sound-Soft Obstacles from Scattered Acoustic Fields

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Carpio, Ana and Johansson, B.T. and Rapún, M.L. (2010) Determining Planar Multiple Sound-Soft Obstacles from Scattered Acoustic Fields. Journal of Mathematical Imaging and Vision, 36 (2). pp. 185-199. ISSN 0924-9907 (Print) 1573-7683 (Online)

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Official URL: http://www.springerlink.com/content/331530771204m12l/fulltext.pdf



Abstract

An inverse problem is considered where the structure of multiple sound-soft planar obstacles is to be determined given the direction of the incoming acoustic field and knowledge of the corresponding total field on a curve located outside the obstacles. A local uniqueness result is given for this inverse problem suggesting that the reconstruction can be achieved by a single incident wave. A numerical procedure based on the concept of the topological derivative of an associated cost functional is used to produce images of the obstacles. No a priori assumption about the number of obstacles present is needed. Numerical results are included showing that accurate reconstructions can be obtained and that the proposed method is capable of finding both the shapes and the number of obstacles with one or a few incident waves.


Item Type:Article
Uncontrolled Keywords:Inverse scattering; Reconstruction; Uniqueness; Shape reconstruction; Topological derivative; Scattering; Sound-soft obstacles; Acoustic waves
Subjects:Sciences > Physics > Mathematical physics
ID Code:14884
Deposited On:19 Apr 2012 08:52
Last Modified:12 Dec 2018 15:07

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