Phononic crystals (PnCs) possessing desired bandgaps find many potential applications for elastic wave manipulation. Considering the propagating essence of three-dimensional (3D) elastic waves and the interface influence of multiphase material. the bandgap design of 3D single-phase PnCs is crucial and appealing. Currently. https://ashleyshomestores.shop/product-category/5-piece-modular-sectional/