Two-dimensional phononic crystals studied using a variational method: Application to lattices of locally resonant materials

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Sonic crystals and sonic wave-guides (2005, background): “The host material may be solid, then the term ‘phononic crystal’ is usually used [16–18, 29, 30, 38, 66, 69, 85, 86, 94] for the artificial crystals.”
Classical vibrational modes in phononic lattices: theory and experiment (2005, unknown): “[22–24].”
Visco-elastic effects on wave dispersion in three-phase acoustic metamaterials (2016, background): “Furthermore, since the Kelvin-Voigt model is often used to represent visco-elastic losses in damped PnCs and AMMs, it seems to be reasonable to evaluate its applicability regions by comparing the attenuation spectra with those calculated with a generalized Maxwell model.”
Tailoring Structure‐Borne Sound through Bandgap Engineering in Phononic Crystals and Metamaterials: A Comprehensive Review (2022, methodology): “[186,187] used the FDTD method to analyze the transmission spectrum of elastic waves through a lattice of cylindrical cores coated with a soft material, and investigated the effect of different materials of the core on the resonance.”