Architected lattices for simultaneous broadband attenuation of airborne sound and mechanical vibrations in all directions

Abstract

Phononic crystals and acoustic metamaterials are architected lattices designed to control the propagation of acoustic or elastic waves. In these materials, the dispersion properties and the energy transfer are controlled by selecting the lattices' geometry and their constitutive material properties. Most designs, however, only affect one mode of energy propagation, transmitted either as acoustic, airborne sound or as elastic, structural vibrations. Here, we present a design methodology to attenuate both acoustic and elastic waves simultaneously in all polarizations. We experimentally realize the first three-dimensional, load bearing, architected lattice, composed of a single-material, that responds in a broadband frequency range in all directions.

References in corpus (2)

• Composite 3D-printed meta-structures for low frequency and broadband vibration absorption
• Spiral-based phononic plates: From wave beaming to topological insulators

Cited by in corpus (7)

• Tailoring Structure-borne Sound Through Bandgap Engineering in Phononic Crystals and Metamaterials: A Comprehensive Review
• Theory of Truncation Resonances in Continuum Rod-based Phononic Crystals with Generally Asymmetric Unit Cells
• Phononic-subsurface flow stabilization by subwavelength locally resonant metamaterials
• Experimental realization of phonon demultiplexing in three-dimensions
• Metamaterial shields for inner protection and outer tuning through a relaxed micromorphic approach
• Metamaterials and Fluid Flows
• Sparse metapiles for shear wave attenuation in half-spaces