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Low-Frequency Sound Transmission through Periodically Inhomogeneous Plates with Arbitrary Local Anisotropy and Arbitrary Global Symmetry

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The problem of low-frequency sound transmission through periodically inhomogeneous plates is traced back to the known solution for homogeneous anisotropic plates. This is accomplished by an exact homogenization procedure which deduces the effective moduli from at most 18 Bloch-wave velocities along 6 directions of the periodic structure. The formulation is completely general with respect to both local anisotropy and global symmetry of the periodic structure. In addition, the special cases of local isotropy and global orthotropy are also given explicitly. Material damping may be accounted for by adding imaginary parts to the effective moduli. The method is illustrated by two examples related to building acoustics.
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Document Type: Research Article

Publication date: 1996-07-01

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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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