A Systematic Review of Emerging Ventilated Acoustic Metamaterials for Noise Control

As sustainability is one of the main pillars in developing future cities, adopting natural ventilation whenever possible is one way to reduce energy consumption, thus indirectly reducing carbon dioxide emissions. Lately, ventilated acoustic metamaterials have started to receive more research attention because of how they can provide both ventilation and noise control. Motivated by this research attention, we present this timely systematic review of emerging ventilated acoustic metamaterials for noise control. By limiting the review to a five-year coverage (2018-2023), three kinds of ventilated acoustic metamaterials were identified-metamufflers, metapanels, and metacages. Based on the studies included in this review, we discuss the present challenges of metacages. More research efforts are still needed to see real-world applications of metacages as a novel ventilated noise control measure in the future.

Automated summary

As sustainability is crucial for future cities, natural ventilation is a way to reduce energy consumption and carbon dioxide emissions. Ventilated acoustic metamaterials, which provide both ventilation and noise control, have gained research attention. In this systematic review, three types of ventilated acoustic metamaterials were identified. However, more research is needed to address the challenges of one type, metacages, for its real-world applications in noise control.