We report a new class of tunable and switchable acoustic metamaterials comprising
resonating units dispersed into an elastic matrix. Each resonator consists of a metallic core …

A major limitation of current acoustic metamaterials is that their acoustic properties are either
locked into place once fabricated or are only modestly tunable, tying them to the particular …

Acoustic metamaterials have subwavelength characteristics and hence they can be used for
the low-frequency noise and vibration control. Usually, acoustic metamaterials have …

Locally resonant metamaterials are characterized by bandgaps at wavelengths much larger
than the lattice size. Such locally resonant bandgaps can be formed using mechanical or …

The proposed structure comprises an array of elastomeric helices that can be easily
stretched in the axial direction (see Figure 1). In the undeformed configuration the helices …

The realization of acoustic devices analogous to electronic systems, like diodes, transistors,
and logic elements, suggests the potential use of elastic vibrations (ie, phonons) in …

We introduce and experimentally demonstrate a class of fully programmable digitally
controlled metamaterials. An elastic waveguide is connected to synthetic impedance circuits …

Composite materials with engineered band gaps are promising solutions for wave control
and vibration mitigation at various frequency scales. Despite recent advances in the design …

Local resonance band gaps in acoustic metamaterials are widely known for their strong
attenuation yet narrow frequency span. The latter limits the practical ability to implement …

We introduce a strategy to attain reconfigurable, highly focused, subwavelength wave
patterns in cellular metamaterials via electromechanical tuning of their microstructures. The …