Have you ever had a conversation with someone that you haven’t spoken with in many years, and thought their voice sounded different? As it turns out, it probably was.

The vocal system — comprised of the vocal and nasal tracts — are directly supported by the lungs, nervous and hearing systems. Altogether it takes between 70 and 100 muscles to make a sound. As these systems change over time, they alter the speed and volume of a person’s voice. A common example is hearing loss, which can cause a person to speak much differently than they typically would.

Research shows that between the ages of 48 and 68, the voice will actually dip in frequency. And between the ages of 68 and 98, it rises again.

Aging presents one of the top challenges for developers when designing voice biometric authentication systems. Unlike fingerprints, which do not change with time, voice biometric systems need to account for all of the different variables that can impact user authentication.

VoiceVault’s voice biometric engine, was specifically designed to account for voice changes over a prolonged period. This is possible because VoiceVault measures many different aspects of a user’s voiceprint — like the average pitch of their voice, the speed which they talk and the amount of time between sounds.

This intelligent system is even able to take into account daily fluctuations in users’ voices. For instance, if a user loses his or her voice or comes down with a cold, that person will still be able to log in as they would if they were sounding normal.

To learn more about voice biometrics, click here.

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