What acoustic design possibilities can be achieved using metal panels for walls1

Metal panels offer substantial acoustic design possibilities through the use of perforation patterns, absorptive backings, and cavity management, enabling both interior sound control and exterior noise mitigation. Internally, perforated metal panels backed with mineral wool, fibrous liners, or acoustic foams convert reflective metal surfaces into absorptive assemblies that control reverberation and improve speech intelligibility in lobbies, auditoria, and open-plan offices. The perforation geometry—open area percentage, hole diameter, and pattern distribution—can be tuned to target specific frequency ranges; larger open areas and thicker backing materials increase low-frequency absorption potential. The metal skin provides a durable, cleanable surface suited to high-traffic interiors while the absorptive layer handles acoustic performance. For external façades near highways or airports, perforated metal can act as a ventilated acoustic screen when combined with cavity absorbers and tuned slots, reducing transmitted road noise into the building without sacrificing ventilation. Additionally, micro-perforation and multi-layered backings allow discreet solutions where aesthetic continuity is required. Acoustic isolation between spaces can be enhanced by incorporating floating internal panels with resilient mountings that reduce flanking transmission. Integration with HVAC and service penetrations must ensure airtightness where necessary to maintain acoustic performance. Computational acoustic modeling and sample testing are recommended to validate predicted outcomes. In summary, by combining perforation design, absorptive liners, cavity tuning, and careful integration, metal panels become a versatile element in acoustic design strategies.