Transmission loss of a labyrinthine acoustic metamaterial augmented with multichannel feedforward active noise control
Phys. Rev. Applied 25, 014067 – Published 28 January, 2026
DOI: https://doi.org/10.1103/crg1-lp6y
Abstract
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 active noise-control treatments achieve control via the introduction of additional acoustic sources driven to generate a secondary sound field that interferes in a controlled way with the original primary sound field. This paper presents an investigation into combining these two noise-control techniques to achieve enhanced noise control over a spatial region using a “hybrid” device. In particular, conventional feedforward ANC is combined with a labyrinthine metasurface and the increase in performance offered by the hybrid solution is demonstrated.
