My 7yo has an awful habit of deliberately making loud noises when I am trying to speak to DH or his sister.
The noises themselves will vary from singing (mostly) to humming to doing a funny voice to literally just shouting.
He has done it since DC2 was born when he was 2.5 - he would sing or shout every time she cried - and now it has morphed into literally every time I try to have a conversation at home that doesn’t directly involve him.
I have tried talking to him about it and he acknowledges it’s rude but it’s clearly habitual after so many years. We do consequences eg no tv if he does it 3 times in a day - but these seem to have no lasting effect.
It is driving me mad. Before anyone asks, he is NT and otherwise well-behaved.