as im sure your probably aware, all birds are different. Sometimes you will find really quiet birds, sometimes they will be loud. My friend has a conure and he rarely ever squaks/talks but the conure i had was the most annoying little squaker ever.
i think as a general rule, the smaller the bird the quieter they will be.
But, quiet is all relative... Ive had parakeets that made noise almost alll day, but it was a quitier chirping that was almost soothing. My conures squak wasn't rediculously loud, but he squaked all the time. My Amazon will let out incredibly loud squaks for like 30 seconds a couple times every day, but for the most part he just likes to talk and whistle when im home. Even though my conures squak isn't as loud as the amazons, i still say he is the loudest because he does it all the time.
Are you wondering the noise because you live in an apartment? With my amazon i could never live in an apartment because when i wake up at 6:30ish he lets out an enormous squak because he is happy. So, you have to decide which kind of noise you can handle.