I didn't anticipate acoustics to matter, yet perforation patterns, backing materials

https://cristianjsii673.lucialpiazzale.com/roofing-vents-that-level-copper-s-century-of-performance-in-demanding-climates

I really did not expect acoustics to matter, yet perforation patterns, backing products, and panel depths in metal ceilings tame reverberation while keeping crisp, modern-day lines.