Acoustic Illusion and Cloaking: Active Spherical Body
In this paper, we aim to answer these fascinating questions: Is it possible for a spherical body to vibrate so that in the presence of an identification harmonic acoustic wave field, it appears to be an object with different (larger) size or with different material composition or to be cloaked? In order to answer these questions, the problem of monochromatic acoustic scattering from a spherical body vibrating at same frequency as the incident wave field is solved and it is shown that the scattering patterns corresponding to the above desired states, have unique solutions as the output of a system with specific vibration characteristics (i.e. geometrical pattern and amplitude). An illustrative numerical example is given in order to examine the viability of the proposed approach.
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Document Type: Research Article
Publication date: May 1, 2019
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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