Architected Lattices for Simultaneous Broadband Attenuation of Airborne Sound and Mechanical Vibrations in All Directions

@article{Bilal2018ArchitectedLF,
  title={Architected Lattices for Simultaneous Broadband Attenuation of Airborne Sound and Mechanical Vibrations in All Directions},
  author={Osama R. Bilal and David Ballagi and Chiara Daraio},
  journal={Physical Review Applied},
  year={2018}
}
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… 

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References

SHOWING 1-10 OF 87 REFERENCES
Dark acoustic metamaterials as super absorbers for low-frequency sound.
TLDR
A thin-film acoustic metamaterial, comprising an elastic membrane decorated with asymmetric rigid platelets that aims to totally absorb low-frequency airborne sound at selective resonance frequencies ranging from 100-1,000 Hz, can reach almost unity absorption at frequencies where the relevant sound wavelength in air is three orders of magnitude larger than the membrane thickness.
Spiral-Based Phononic Plates: From Wave Beaming to Topological Insulators.
TLDR
A platform that ultilizes a lattice of spiraling unit cells to create phononic materials encompassing Bragg scattering, local resonances, and inertial amplification is presented and it is shown that the beaming trajectory can be continuously tuned, by varying the driving frequency or the spirals' orientation.
Composite 3D-printed metastructures for low-frequency and broadband vibration absorption
TLDR
This work presents a class of materials (labeled elastic metastructures) that supports the formation of wide and low-frequency band gaps, while simultaneously reducing their global mass.
Acoustic metamaterial panels for sound attenuation in the 50–1000 Hz regime
We show experimentally that thin membrane-type acoustic metamaterials can serve as a total reflection nodal surface at certain frequencies. The small decay length of the evanescent waves at these
Ultrasonic metamaterials with negative modulus
TLDR
A new class of ultrasonic metamaterials consisting of an array of subwavelength Helmholtz resonators with designed acoustic inductance and capacitance with an effective dynamic modulus with negative values near the resonance frequency is reported.
Experiments on seismic metamaterials: molding surface waves.
TLDR
For complex natural materials such as soils, this large-scale experiment was needed to show the practical feasibility of seismic metamaterials and to stress their importance for applications in civil engineering.
Acoustic metamaterial with negative modulus.
TLDR
Experimental and theoretical results on an acoustic metamaterial that exhibits a negative effective modulus in a frequency range from 0 to 450 Hz are presented and a theory is provided to explain the experimental results.
Acoustic band structure of periodic elastic composites.
TLDR
This work presents the first cull band-structure calculations for periodic, elastic composites and obtains a «phononic» band gap which extends throughout the Brillouin zone.
Acoustic metamaterials: From local resonances to broad horizons
TLDR
This review traces the development of acoustic metamaterials from the initial findings of mass density and bulk modulus frequency dispersions in locally resonant structures to the diverse functionalities afforded by the perspective of negative constitutive parameter values, and their implications for acoustic wave behaviors.
Design of phononic materials/structures for surface wave devices using topology optimization
We develop a topology optimization approach to design two- and three-dimensional phononic (elastic) materials, focusing primarily on surface wave filters and waveguides. These utilize propagation
...
...