You are the ghost

A prentender game: One player is the pretender (in this game "ghost")and try to pass as a "normal" player: Everyone except the pretender is hearing the same sound via a smart device and then picks a card and explains why this card fits to the sound. The pretender still as to pick a card and bluff. At the end everyone tries to find the pretender. Points are awarded for correctly guessing the pretender and for the pertender if he gets annoticed or, if he is caught, can guess which sound the other players have heard