My lovebird squacks alot too..but when i take it out of his cage
he quiets down. Are you covering his cage at night? Also my bird
responds to other noises in the house. He hates my blow drier
and will squawk like his life depends on it when i'm using it.
The telephone ring could also make them get loud. My bird also
gets loud when i leave them room. So basically there is nothing
you can do. but make use to cover it at night so that it knows
to get quite.