Magneto-Mechanical Bilayer Metamaterial with Global Area-Preserving Density Tunability for Acoustic Wave Regulation

The presented 2D metamaterial consists of two layers that are actuated separately by a remotely applied magnetic field. This novel bilayer design strategy enables the adjustment of the area density while simultaneously preserving the overall dimensions. These designs can be further exploited in acoustic applications, including highly tunable bandgaps and waveguides.