I think the noise they make is kind of neat but I never hear mine when I am in the house. I guess it's how your located because the neighbor almost 2 miles down the road said she heard them and thought someone was being killed. When she found out it was peacocks she just wanted to see them and enjoy their beauty also. So I guess if you are concerned before you take the plunge is ask each neighbor first. Also if talking to the neighbors doesn't work for you check if their is a noise ordnance where you live.
My daughter lives on the out skirts of town with 3 peas. They have had some complaints from people in town, but they are out of the city limits, I guess noise ordnance. They have a lot more complaints about their donkey though than the peas.
I live in the country so ambulances and police cars keep me a wake when staying in the cities, yet people dwelling in the city aren't waken by them. I think it's all what you get use to or your neighbors frame of mind.