Data‐Driven Enhanced Performance Coupling: Multi‐Scale Sound‐Absorbing Lattices

Noise pollution has emerged as one of the world's three major pollution sources, attracting widespread attention from researchers. However, existing traditional porous materials can only address high‐frequency noise, while artificial acoustic metamaterials with potential for low‐frequency applications face challenges such as narrow absorption frequency bands, high design complexity, and significant labor costs. To address these challenges, we propose a data‐driven multi‐scale coupling strategy‐designed acoustic lattices (DML), achieving ultra‐wideband sound absorption with minimal manual intervention and time investment, demonstrating significant potential for applications in aerospace, marine, and transportation fields. Research results demonstrate that DML obtained through data‐driven forward/inverse design (reducing time cost by 99.9%) achieves an average sound absorption effect of 85% across an ultra‐wideband range of 220–10 000 Hz. The near‐perfect absorption band (>0.9) occupies 60.3% of the total computational frequency range. During the coupling process between microscopic thermo‐viscous friction and macroscopic local resonance sound absorption mechanisms, the pressure diffusion effect effectively enhances coupling efficiency (shifting the first absorption peak 600 Hz downward). This research methodology provides a novel paradigm for next generation metamaterial design based on multiscale coupling.