Author(s): Gregory M. Hernandez, Jordan Cheer, and Gianluca Memoli Acoustic metamaterials and active noise control (ANC) are two advanced noise-control treatments that can typically offer performance that exceeds that of conventional passive noise-control treatments. Acoustic metamaterials utilize subwavelength structures to realize sound-field control, while activ… [Phys. Rev. Applied 25, 014067] Published Wed Jan 28, 2026