I really did not expect acoustics to matter, yet opening patterns, backing products

https://blast-wiki.win/index.php/Roof_Covering_Air_Vent_Honesty:_Just_How_Hand-Fabricated_Copper_Holds_Up_Over_100_Years

I didn't anticipate acoustics to matter, yet perforation patterns, backing products, and panel midsts in steel ceilings tame reverberation while maintaining crisp, modern-day lines.