I didn't expect acoustics to matter, yet perforation patterns, backing products

https://beckettrtvu286.capitaljays.com/posts/roofing-system-air-vent-resilience-copper-parts-that-outlive-the-building-code-cycle

I really did not expect acoustics to matter, yet perforation patterns, backing materials, and panel depths in steel ceilings tame reverberation while maintaining crisp, contemporary lines.