Metamaterial with more shapes than atoms allows endless sound control

Researchers at the University of Connecticut have developed a groundbreaking programmable acoustic metamaterial capable of real-time tuning with an almost infinite number of configurations—surpassing the number of atoms in the universe. Unlike traditional metamaterials, which are rigid and fixed in function, this new design features an 11×11 grid of asymmetrical, motor-controlled pillars that can be individually rotated in one-degree increments. This allows precise manipulation of sound waves by bending, dampening, or focusing them, enabling the material to adapt instantly to different tasks and frequencies. One of the most promising applications of this metamaterial lies in medicine, where it can focus sound waves with extreme precision to non-invasively target tumors, kidney stones, or manipulate microscopic particles inside the body. This capability could revolutionize therapeutic ultrasound and medical imaging techniques like acoustic tweezers. Beyond healthcare, the technology also holds potential for energy savings by reducing drag on moving objects. To manage the vast design possibilities, the research team is employing AI and machine learning to