sound proofing!

had to go to the stereo shop today for another car and got a little dynamat for my truck. I want to slowly cover most of the inside of the cab with this to kill road noise. spent $20 for about 48"x18" strip.
Just did the back wall on the access cab. seats just pop straight out
I haven't gone on the freeway yet, but it seems a little better.

 

Dude...don't buy from your stereo shop, go to raamaudio.com and get a roll of that stuff for around 100...do the doors it will make a big diff

 

no worries, I checked the online prices.. it's about the same, minus waiting for it.
it was from their roll, not a prepackaged kit

doors are next, inside of outer skin and outside of inner skin. actually the rear access cab doors are rattling like a mofo with the bass.

 

Which area makes the most difference for sound proofing? The doors, the floor, or??????