Screaming blue fronted amazons

by Deb love
(Stockton on tees UK)

Hi again I am here for some more advice I have 2 hand reared blue fronted amazons they are none related and coming up to 1 year old. Every time we turn the TV or Radio on they start shouting this has been happening for quite a while now I was hoping it would settle down on its own but now they have started to scream when we have friends or family visiting.

We have started to put their covers on after about 5 minutes of shouting and this does sem to work but I would rather I could get them to stop through training rather than cover them up can you please help me to resolve this problem