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

https://wiki-cafe.win/index.php/Salvo_Metal_Works_and_the_Fact_of_Copper:_Custom_Chimney_Shrouds_that_Endure

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