Acoustic energy harvesting of ambient noise urban environment

In this work, the efficiency of engineered materials in converting ambient acoustic noise into electrical power is investigated, with a particular focus on 3D-printed acoustic metamaterials. The investigation centers on the performance of sonic crystal-based acoustic metamaterials, which are known for their ability to create bandgaps that inhibit sound propagation. Numerical simulations are conducted to explore the interaction between acoustic waves and sonic crystals, emphasizing the strong scattering effects that contribute to sound attenuation. To further investigate these scattering interactions, experimental measurements of 3D-printed samples are performed. The findings from both simulations and experimental studies are presented and discussed.