I have audio. What characteristics can I use to distinguish people?

Question

Sound processing

I have audio. What characteristics can I use to distinguish people?

Answer 1

Get the spectrum of this audio. Read the material about what formants are.
Formants are relatively unique for each person tones in his voice, which arise due to resonances in the bone structures of the skull.
Learn to isolate formants on the spectrum.
Learn to list formants for a specific voice.
Learn to compare lists of formants.

Answer 2

Formants are scientific research. A certain approach is being developed to solve a scientific problem. There is a sound. There are overtones-compound sounds. The difference in semitones is 200 overtones.