Ran across this last night surfing for sound proofing material to help eliminate the hum of my mud terrains. Looks pretty impressive in they're videos.
Noise Damping Technology for Cars, SUVs, Trucks, RVs, and Other Vehicles
Anyone ever heard of it or used it????

 

There are a number of these out on the market, I was trying to pick what I am going to replace my carpet with. I have only had experience with dynamat panels in a car and they seem to provide some noise obstruction.

Lizardskin, dynamat spray on, bquiet, and a few others out there ive seen adds for.

Kind of surprised no one else on the forum has responded. Also surprised there have not been any "it is a shaped like a box it is going to have noise"

if you do try one out reply back and let us know.
Good luck.