Switchable Bidirectional Sound Absorption Via Exceptional Point Modulation in Acoustic Metastructures with Interleaved Resonator Coupling.

ABSTRACT: Physics-driven acoustic metamaterials offer unprecedented capabilities in manipulating sound wave propagation. Among these, sound-absorbing metamaterials emerge as powerful tools for achieving subwavelength control and high-efficiency absorption. However, most existing designs are typically constrained to unidirectional absorption, limiting their applicability in noise-sensitive scenarios requiring bidirectional control. Here, a switchable bidirectional acoustic metastructure is presented, integrating interleaved resonator coupling with exceptional point (EP) modulation. By coordinating vertical and horizontal resonant interactions through tailored impedance matching and controlled energy dissipation, the system achieves broadband and frequency-selective absorption in both directions-valid

SUBMITTER: Guo Z 

PROVIDER: S-EPMC12667512 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature