MIT researchers have developed a novel framework for controlling ultrasound wave propagation using advanced acoustic metamaterials at the microscale. By designing a lattice structure with precisely positioned spherical masses, they achieved tunable wave velocities and advanced wave-guiding capabilities. The study demonstrates the potential of these materials for applications in ultrasound imaging, medical diagnostics, and mechanical computing. Using high-throughput laser ultrasonics, the team characterized the materials’ dynamic properties and even created an acoustic demultiplexer. This work not only advances the design and fabrication of microscale acoustic devices but also highlights the link between material geometry and dynamic wave behavior, paving the way for innovative uses in extreme-condition engineering and beyond.
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