Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

This study presents an experimental and numerical characterization of programmable vibroacoustic metamaterials (PVAMM) utilizing air pressure as an external stimulus. Vibroacoustic metamaterials (VAMM) are engineered systems that exploit resonant structures to create stop bands, effectively attenuating vibrations and sound across a broad frequency range. By integrating air‐pressure‐responsive unit cells, we demonstrate the tunability of resonance frequencies, allowing for adaptive noise and vibration reduction tailored to varying traffic conditions. Experimental setups were developed to characterize both single unit cells and larger PVAMM plates, with results validated against numerical simulations. The findings reveal a scalable approach for designing lightweight metamaterials with programmable properties, paving the way for innovative applications in acoustic insulation and structural dynamics.