Overview

• The metamaterial’s phase-gradient supercells generate a full 2π phase shift to convert incoming sound into spoof surface waves that dissipate on its surface.
• Physical prototypes have demonstrated up to 70% openness alongside reliable broadband noise reduction across variable frequencies.
• Customizable unit-cell configurations allow tuning of both frequency absorption ranges and airflow rates for dynamic settings such as offices, factories and airports.
• The Zhang Lab has advanced from computational models to 3D-printed prototypes and is now refining designs for scalable manufacturing and commercial integration.
• The PGUOM addresses chronic noise exposure linked to hearing loss, stress and cardiovascular disease while reducing disruptions to wildlife and ecosystems.