i can't hear you

The little one has got MORE new headphones. He goes through them at break neck speed. I don't know what he does with them. The last ones (which he only got at Christmas) inexplicably snapped in half. I made him save up and buy new ones himself. They are AllSingingAllDancingWirelessBluetoothNoiseReduction headphones.
He now can't hear a word that I say when he wears them. Which is All. The. Time.
I got annoyed and shouted really loud at him. I said "You'll have to take the bloody things off 'cos I can't even talk to you any more!" He looked at me, sighed, and said "Just text me mum."
Ace.