Can anyone help me find this book that I'm looking for?

I remember my friend (I forgot who it was) reading it about 3 years ago, it suddenly popped into my mind and I can't stop thinking about it. It's about this girl who has this special talent of making her voice appear to be coming from somewhere else in the room, she does it by doing some hiccup sort of thing. Does anyone recognise this book? :)
 
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