The actual recording of your voice signature measures a range of unique characteristics within your voice, including pitch, tone, harmonics and shape of larynx
Once you have registered and you use your voice signature for authentication, two factors are being measured:
- Neural network technology: This measures the unique characteristics of your speech to distinguish it from others who have recorded their voice signature
- Statistical modelling: This measures the similarities between the speech sample you have given at the current time against the sample you gave when you enrol your voice signature
It is a combination of these two factors that causes an approved or declined response.