There is some noise. You don't exactly have to yell to talk to the other person up front with you if you are running down the highway, but you have to speak up. Actually wind noise is the biggest problem, especially heading into the wind. This is higway speed we are talking about now. The noise mostly comes from the top canvas flapping. With the wind you don't have it.

Off road at slower speeds there's still some noise, but nothing that doesn't become background noise once you are used to the truck.

If you are outside the truck and listen it actully sounds more like the old Volkswagon beetle than anything. I found that out last year when it was being inspected. It doesn't seem to bother deer very much.