It's directly below the Lido Deck. If you look at the deck plan, there are tons of chaise lounges that will get moved and stacked at night by the pools and then again in the morning, they are slid all over the deck to be put in place. (noisy!)
Also, the Horizon Court is above the Aloha Deck. Tables, pots & pans being moved around at night make noise there. Don't forget, that's one of the busiest decks of all on the ship - more passengers go to that deck than any other. Think about all those Island Parties up on that deck, the bands, the people swimming, and the other noises associated with lots of people coming & going.
My sister had a cabin on the Aloha Deck and experienced some of these noises. Her balcony was very, very small, but was fully covered. It's all a matter of your own tastes. Had my sister known ahead of time that the Caribe balconies were so much bigger, she would have paid the little bit extra to get one and to avoid the noise directly above her.
If you look at the deck plans, you'll notice the Aloha Deck inside cabins are right under the pools. Will there bill very loud pool equipment running night & day? Will you hear people jumping into the pools above you? Just some considerations. If I were you, I'd go with the inside cabins on the Baja Deck. That way, you'd be 'insulated' by the cabin deck above you and the cabin deck below you.
