Behaviour modification techniques?

[dodge__driver11]

I have a little boy that for some reason likes to hum. (I think its a comfort thing) Well it gets on my nerves, because its the same pitch and it goes on forever..Kinda like a buzzing light or a dripping tap....

He has a humming chair; every time it starts that's where he goes without fail.....And the humming is getting to be less of an issue. Because he feels like he is missing out when he sits alone in the kitchen in his chair. Too, he also knows that he can go to his chair when he feels that need.

Note: I do not punish him in any way, this is just a way for him to hum without drawing attention...It was actually making a dcg cry.