Welcome to the Wonderful World of Macaws!
An odd statement for me to state as I'm an Amazon Snob...
Regarding building a special room or a chamber - likely a waste of time and money as if you become a Traditional Family that is Owned by a Macaw and your Macaw will be out and about more than in the 'special' area, plus once your extremely intelligent Macaw figure the true reason for the area, she will not make a sound while in it.
Most Parrots have at least two very noisy time during each day: Welcoming the Suns arrival and wishing it a good evening. The exact time can float a bit.
You will find that if you go crazy bird person early and maintain an on-going 'contact call' based communication, your Macaw will likely not be an on-going screamer. Remember that like most Parrots, they are social creatures that 'want' to be in on-going communication (contact) with their family. You will also find that they 'want' to be around their flock as much as possible.
Regarding noise levels and what can be done to keep the noise down, commonly this has more to do with just how close they are and also your current relationship with your neighbors. Macaw's and Too's are commonly likened to Jet Engines... Noise dampening can be difficult to achieve, not impossible, but difficult. Working at limiting your Mac's need to communicate, At Volume, with his flock is one of the best tools. But, if you feel the need; Remember that Sound waves slow best when there are gaps between the surfaces. Think, insulted wall, space, vertical blanket, space vertical blanket, space vertical blanket.
Our Double Yellow-head Amazon can wake the neighbor two homes away. But, with good luck it is rare that he finds a need to wake anyone. Commonly, he is releasing an alert call, like when the Wild Life Rangers are wandering the neighborhood looking for Geese. With near everyone near us knowing we have an Amazon, when they walk by our home, they are talking to our Amazon. Some Summer days, we can have three or more couples entertaining our Amazon.
Parrots and good relationships with one's neighbors are the best resolve. Especially when they determine if one's Parrot is rattling the rafters, there is commonly a good reason... One of the Legionary Events in our neighborhood was when our Amazon had the Rangers running around our home looking for that goose!!! Yes, our Amazon was goose calling and he would fly from the back to the front and back again goose calling out the windows. It was but a very short time that near all of our near by neighbors were enjoying the sight!
Please take the time to visit the Amazon Forum. At the top you will find a Highlighted Thread (Sticky) in light blue, Titled: I Love Amazons - ... That huge Thread contains more than Thirty segments that revolve around Living and Loving Amazons (Note: Simply insert Parrot) and you will find it a wealth of Knowledge. Also, regarding diet, you will find that the Diet listed a very near that need by a Macaw, simply increase the protein percent a bit.
Tons more, for now, enjoy the reading out loud, while sitting next to your Mac.
FYI: Did you get a complete Hatch Certificate with your Macaw? If not return to the shop that sold you your Macaw and request it and then provide a copy of it to your Avian Professional. I believe that your Macaw is listed as either a CITES class #1 or #2 and such documentation is required. That documentation should include the Hatch Date, your girl's parents species, all medical documents including the DNA Certificate. Also, include the purchase receipt. Not all Macaws require a CITES document set, but I believe that your's does.
Enjoy...
