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Hence, at least two periodic scales (microscopic and mesoscopic, respectively) comprise the macroscopic acoustic composite media.
This article introduces a computational framework for studying frequency band structure and absorption behavior in multi-periodic acoustic composite structures.
The framework is applied to four multi-periodic acoustic composite structures in order to demonstrate the framework's utility and to reveal novel properties, particularly those which can be influenced by design of the mesoscopic unit cell.
Herein, multi-periodic acoustic composite structures are defined as periodically-layered acoustic media wherein each layer is composed of periodically-repeated fluid unit cells, especially those arising from the study of porous materials.
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Lee, S. et al. Composite acoustic medium with simultaneously negative density and modulus.
Chowning, J., and B. Mont-Reynaud, Intelligent Analysis of Composite Acoustic Signals, Final Report,, Stanford, California, Stanford University Department of Music, 05/1986.
Two approaches to control the vibration and acoustic fields of composite mechanical structures that are being developed in the A.A. Blagonravov Institute are presented.
Acoustic responses of composite sandwich plates with lattice truss core to the subsonic turbulent boundary layer are investigated.
This work was focused on the examination of the effect of the pre-stress, namely tension and pressure, on the wave propagation and acoustic behaviour of composite laminates.
Furthermore, the acoustic property of composite with 20% SHPF concentration and 3 mm thickness was noted in the low frequency range, giving a sound absorption coefficient peak, 0.695 at 2500 Hz.
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