Architected Lattices for Simultaneous Broadband Attenuation of Airborne Sound and Mechanical Vibrations in All Directions
By Osama R. Bilal, David Ballagi, Chiara Daraio. 2018
88 citations recorded by the source corpus.
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.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Mechanical Engineering
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Citations in the corpus
- How to See Hidden Patterns in Metamaterials with Interpretable Machine Learning (2021, background): “For example, compared to conventional composite materials, mechanical metamaterials can be surprisingly lightweight and strong [53, 65], can have controllable fracture toughness [22], and can be highly energy- and vibration-absorptive [3, 17, 35, 42, 43].”