Uniqueness in determining multiple polygonal scatterers of mixed type (Q928344)

The authors establish that a polyhedral scatterer in \(\mathbb{R}^2\), than can be formed by many sound-hard and sound-soft polygons, is uniquely determined by a single far-field measurement, without a priori information on the physical property of each component. Mixed material is a hot topic in acoustics. This paper is a continuation of a previous paper by the authors [Inverse Probl. 22, No.~2, 515--524 (2006; Zbl 1094.35142)].