Soundproof enclosure for air compressor?

[Dustin Smith]

I came across this sound-deadening box for a Shop Vac on FineWoodworking and thought it might work well for my loud air compressor, too. (My workshop is in our townhome garage, so I'm trying to do my neighbors a favor....so please no "wear hearing protection!" replies)

http://www.acousticalsurfaces.com/echo_eliminator/shop_vac.htm?d=0

This dropped the sound level from 83 to 58 decibels (60 is normal conversation)! Any drawbacks to enclosing an air compressor in a box like this? Anyone tried this? If it matters, my compressor is the Dewalt 15g 200psi upright model.



Thanks!
Dustin