Charles, I can sympathize with you on the noisy environment. I'm on a "bigger" route in a small city / big town and have traffic noise constantly. My living room and HT is on the front corner facing a big 5-way intersection with the high school across the street and a hospital up the road. Replacing our windows helped, but I'm not sure there is much more I can reasonably do.
Several years ago, while building my soundbooth, I found losts of good information on the
Auralex site. It's a little odd to navigate as there's Auralex University, Acoustics 101, etc... but it's all there (mixed in somewhere).
Remember that you're looking for information on
isolation... not diffusion or absorption products.
