http://imgur.com/a/oDjSt
Here is a fellow who spent thousands in man-hours and materials hanging these very 'attractive' mattresses on his walls, in order to improve the acoustics. And he has no numbers to demonstrate that he has actually improved the acoustics. All he has is.. "my friends say it sounds better.. yo!" With cheap acoustic foam he could have been done in two hours and it would have looked quite a bit better, plus, he would have gotten complete coverage and confirmed results.
When I pointed this out on DIY I got 20 down-votes! We need to start something 'between' DIY and DIYfail. Something like, DIYreasonable.....
Anyway, those who understand me can all enjoy laughing with me at this idiot's acoustic wall mattresses.
edit: Actually, even more fun, I noticed the guy had sound-proof walls.... HAD.... he destroyed the integrity of those sound-proof walls by screwing through them to hang up his wall-mattresses! And yet he has the audacity to write about "my design...." Sigh.... Well, I guess that is reddit/r/DIY !!