[kaegell]

Hello, everyone,
 
Recently I managed to build myself some cans, from a few scrap pieces here and there (I managed to keep the price under 30 bucks), but the problem I have is that the cups are made of metal, and doesn't isolate that much the outside noises. Do you think something could be done from inside the cups?

 

[penmarker]

Have you tried applying dynamat on the inside of the cups? Be advised this will alter the sound of the cans.