Sound and vibration can impact other sound, it's a small device, works along the same principles as noise-canceling headphones except it's not so much canceling as it is modulating into the right pitches and what not to make someone sound like someone else, I mean voice changer technology(like in phones and what not) is over 50 years old, things improve over time(cellphone technology improvements are a very good example of this...)

Sound and vibration can impact other sound, it's a small device works along the same principles ads noise-canceling headphones except it's not so much canceling as it is modulating into the right pitches and what not to make someone sound like someone else, I mean voice changer technology(like in phones and what not) is over 50 years old, things improve over time(cellphone technology improvements are a very good example of this...)