I tried finding the same information, with it being directly related to the tires being on a KK. However, all I could find was with the tire rated on a number of various vehicles. Most of which were trucks and other SUVs. The tire is rated at 50,000 miles which no one seems to have worn a pair out yet. I did read that they may get a little louder, but no more than your other A/T tire such as the BFG A/T. I think any more that a tires noise sound and loudness is more in direct relation to the road surface and material. That being said, and along with the sound shielding of a KK, I think that you will hear some enough tire and road noise with any tire choice that at times it will get on your nerves.
I don't know if you have seen the tread pattern of the Hankook in person, but it looks very aggressive in photos. In truth it is much closer to the BFG A/T tire.
"If you have a difficult job to do....Give it to a lazy man....He'll find the easy way to do it."