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

https://xeon-wiki.win/index.php/Roofing_System_Vents_with_Staying_Power:_Copper%27s_Century_of_Quiet_Efficiency

I really did not expect acoustics to matter, yet opening patterns, backing products, and panel midsts in steel ceilings tame echo while maintaining crisp, modern-day lines.