I think your question falls under "your mileage will vary", depending on your location on deck 2.On our last cruise, we had 2114, aft, and it was the quietest, most convenient stateroom we've ever had. The cruise before, we had 2520, the noisiest stateroom ever(right below nightclub)
Check out Dave's website at dcltribute.com for a list of the noisier staterooms on deck 2. Although he has my favorite stateroom 2114 listed in the noisy section, I'll vouch for it as quite the contrary....