I've been reading most of your articles on your site and I was wondering: Do bass waves (in general) pass through anything not truly solid (like a table or a cabinet)? Like for instance would they mostly go right though a sofa? I'm curious as to whether one could put some bass traps behind a sofa or chair for instance. I know upholstered furniture can reflect and absorb various frequencies (mine is fabric BTW and not at all overstuffed) and I have about 6" behind it and the wall where some bass traps could be discretely placed, if of course they'd do anything back there.
Thanks for the help. I ran your test CD with my new iPhone frequency meter and got some very interesting results! I did not have the time to do it absolutely thoroughly, and I may have had the volume up a bit too far because by the end I was feeling a little nauseous, and my dog was beginning to run around the house growling, hahaha.