Metamaterials researchers at Duke University have demonstrated the design and construction of a thin material that can control the redirection and reflection of sound waves with almost perfect ...

"New metasurface model shows potential to control acoustic wave reflection." ScienceDaily. www.sciencedaily.com / releases / 2018 / 04 / 180403120011.htm (accessed May 15, 2026).

Sensing an incoming signal is typically associated with absorbing a portion of its energy, inherently perturbing the measurement and creating reflections and shadows. Here, in contrast, we demonstrate ...

The Impedance Tube is a 4m long, with a 50.4mm x 50.4mm square cross-section. The setup can be used both with or without airflow. A 3m long diffusing section can be added to the facility to reduce air ...

An international team of researchers showed how a nonlinear elastic metasurface could convert a wave's fundamental frequency to its second harmonic. Structural factors in metasurfaces, like the ...