Resonance-based acoustic ventilated metamaterials for sound insulation

Recent advancements in acoustic research have increasingly emphasized the dual consideration of sound insulation performance and air circulation efficiency. Traditional sound insulation materials exhibit significant limitations in fulfilling adequate ventilation requirements. Acoustic ventilated metamaterials, however, can simultaneously achieve both sound insulation and air circulation. In this review, we trace the development of many promising works from single-type resonant principles of sound insulation, including Helmholtz, Fabry-Pérot, Fano and membrane resonances. Significantly, we sort out some efforts taken to explore acoustic ventilated metamaterials based on hybrid-type resonances. They may show wider ranges of operating frequency than those based on a single-type. Finally, we discuss the future directions of this rapidly growing field by analyzing the prominent challenges it faces.