You won't find a noisy area at CBR. If you look through this thread you will find many room location reports.
We have stayed at the CBR twice. The first time, were in Jamaica Building 41The location was wonderful. It took us about a minute to walk to the bus stop, less than a minute to get to the Jamaica quiet pool, a minute to the Jamaica beach and about 5 minutes to Old Port Royale. The walk from our building to Old Port Royale was quite nice. We walked over the wooden bridge and through the island in the middle of the lake. All the while you are on the island, you will hear Caribbean music which is a nice touch.
I haven't been to the CBR since the main pool construction has begun but I believe that Safetymom and the other posters have said that it really wasn't hard to walk around the construction area.
We stayed in Martinique in June, 2007 and the location was just as lovely as Jamaica. Our walks took about the same length of time as the ones from Jamaica. Honestly though, I think I liked Jamaica location better because I enjoyed the walk through the island.
As Safetymom said, there really isn't a noisy area at the CBR. Both the Jamaica and the Martinique areas were nice and quiet. My family and I took the walk around the entire promenade/resort and all of the locations seemed quiet.
Speaking of the promenade, it's a nice, peaceful walk. You get to see all of the villages and, at one point, the walkway goes through a semi-wooded area. You'll also see lots of little animals....lizards, rabbits, squirrels and a variety of birds. The marina rents surrey bikes and bicycles and, if you would rather ride a bike instead of walk around the promenade, you can do that too.