This technology is a materials-based method of controlling acoustic wave propagation using anti-resonance control. By integrating phase-change inclusions into acoustic metamaterials, this technology provides a material that allows bidirectional signal transport at certain frequencies and only unidirectional transport at other specific anti-resonance frequencies. This enables the development of devices and sensors, including reconfigurable RF filters, directional acoustic switches, non-reciprocal devices, and adaptive signal processing systems that can switch between bidirectional and unidirectional transport through frequency selection without requiring mechanical or geometric modifications. Background: Traditional methods to control acoustic wave propagation use resonance phenomena and they typically require physical mechanisms to modify directionality. This technology introduces a metamaterial that is unidirectional at certain frequencies and bidirectional at others, making it possible to alter directionally by modifying frequency. The technology relies only on material properties, with no need for additional mechanisms. Applications:
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