Deaf and Dumb

I listen to music while I work. It's not like I cannot listen to music while working, but given a choice, I put on my headphones and listen to my favourite music. To the other people in my house, I am temporarily deaf. Sometimes when my mother wants to speak to me while I'm listening to music, she says it out loud and when she's finished and I finally realise she's trying to say something, I remove my headphones and turn back to listen to her, she communicates with me using hand symbols.

I think she does it on purpose.