Voiceprint. What is it and how is it created?
A voiceprint is a digital model of your voice characteristics, used in biometrics for identification and identity verification. It is unique to each person.
To create such a voiceprint, you need:
- Record a voice sample. As you speak, the system captures sound waves. The analog sound is converted into a digital format, a so-called string of numbers.
- Cleanse the sample of ambient noise. Algorithms remove noise, and then the sound is normalized to equalize its loudness.
- Split the recording into micro-fragments. Using mathematical algorithms based on artificial intelligence, the recording is divided into millisecond fragments, from which key voice characteristics are extracted. These include anatomical features such as the structure of the vocal cords, the shape of the mouth, the frequency of the voice, etc., as well as behavioral characteristics such as accent, speech rate, and breathing pattern.
- Encrypt the voice sample. The collected data is processed using a hash function, resulting in an encrypted string of numbers representing a specific voice. And that's exactly what a voiceprint is.
A voiceprint isn't an audio file. You can't play it back to hear your own voice, and there's no way to recover the original data from which it was created.