Hybrid fractal acoustic metamaterials for low-frequency sound absorber based on cross mixed micro-perforated panel mounted over the fractals structure cavity | Scientific Reports
Perforated Metal Sound Absorbing Panels | Kinetics KNP - Kinetics Noise Control | Manufacturer
Acoustic insulation: rock wool and perforated sheet - URANIA GROUP
Effect of hole on sound absorption coefficient of micro‐perforated panels investigated by Melling computing - Wang - 2019 - Concurrency and Computation: Practice and Experience - Wiley Online Library
Absorption Coefficient of a Double-Layer Inhomogeneous Micro-perforated Panel Backed with Multiple Cavity Depths | SpringerLink
Applied Sciences | Free Full-Text | A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
PDF] Low-frequency sound absorption of hybrid absorber based on micro-perforated panel and coiled-up channels | Semantic Scholar