Voice recognition is something that isn’t understood very well. An example of this would be the recent James Foley news, where a lot of media outlets questioned voice biometrics, not fully understanding how it works. Below are a few facts to clear up any confusion you may have.
The unique characteristics in your voice mean a voice print can be created. This voice print mean that you can be identified using your voice.
The same way we all have a unique finger print; we all have unique voices also. Our voice print if actually more sophisticated than a fingerprint, with five times more characteristics in our voice compared to our fingers.