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What is voice biometrics?

Biometrics is the science of measuring and analysing human biological factors. Therefore, voice biometrics involves measuring and analysing a person’s voice. The technology involved works on the principle that an individual’s voice is unique, in the same way that a fingerprint and other biometric characteristics are unique.

The uniqueness of a person’s voice is due to their physical characteristics and their speech habits. Due to that uniqueness, the identity of a speaker can be established or verified through an analysis of their voice. When a user registers in a system by providing samples of their voice, personal voice patterns are extracted from the audio and a unique reference model is created. The model or template is called a voiceprint, which is analogous to a fingerprint.

To identify or verify that a person is who they claim to be, voice biometrics technology uses algorithms to analyse their speech and compare that to the previously created model. If there is a match, the voice biometrics system will confirm that the speaker is the person registered against the voiceprint. Using a person’s voice in such a way has become an accepted and established practice.