I have a Yellow Collared Macaw, which is also a mini-macaw, like a Hahns is. Apart from a week long or so period of time, about a week after bringing her home, Loki has never been very noisy at all. I think maybe once she felt comfortable with us, she kind of tested the waters with acceptable noise levels. We ignored any unwanted noise, and she gets tons of affection, so she's happy, and quiet.
I will say, that since we have added Wingnut, a Military Macaw to the family, she has become a little more vocal. He is large, and noisy (we are trying to diminish that) and they call to each other. He screeches sometimes, and she will imitate his ear piercing screech, but hers is little, and soft, and cute.
Hope this helps.