Frequently Asked Questions

Here are answers to some of the most common questions we receive.


The main advantage that voice biometrics has over other biometrics is its ability to prevent spoofing in the case of a data leak. If your fingerprint or retina data were to be stolen, the biometric security would be compromised beyond repair; you cannot (easily) change your retina or fingerprint. However, because voice biometrics employs text-dependent characteristics, you can simply adopt a new voiceprint phrase and wipe out all previous enrollments in the case of a biometric data leak. Furthermore, in specific situations where fingerprints or retinal scans cannot be used (such as laboratories where gloves leave residue on fingers and gloves cannot be removed until one has exited the lab), voice biometrics possess added advantages.

Another main advantage is the Equal Error Rates are much lower than Finger, Iris, and Face. See Chart below:
Our biometrics engines automatically reject any authentication that matches too closely with a previous recording, as there will always be subtle differences each time you speak.
We support authentications in many languages.
Text dependent characteristics and text confidence detection are currently supported in 88 languages
Contrary to popular belief, "My voice is my password," is an unsecured phrase. Due to repeating IPA phonetics (sounds) and length, it does not meet our security standards. Approved phrases contain enough data and IPA phonetics to allow for an accurate voiceprint. Phrases can be requested and managed under the Voiceprint Phrases section of the developer console. Requested phrases should have no repeating IPA phonetic and be a minimum of 8 syllables.
Speak in a normal tone and speed. Please make sure to enroll and authenticate 1 full second after the beginning of the recording. We recommend using a cue or trigger to help your users know that the recording has started. Watch Video
VoiceIt incorporates noise-cancelling and voice detection technology for enrollment and authentication. 
Our biometrics engines intelligently enrolls certain successful authentications and tracks gradual changes in your voice over time. For some sudden changes, such as sickness, your voice may be too different to authenticate. However, this only happens in extreme cases.
Here are some possible reasons that your recording might have failed:
Your recording was too short or too long (must be at least 1.3 seconds long and no longer than 5 seconds).
You did not use an approved voiceprint phrase.
The voiceprint phrase spoken was too short.
Background noise may have been too loud.
Recording volume may be too low.
Based on our current platform, there are no false positives (FAR) when the confidence level is set at or above 90%, while keeping false negatives (FRR) under 20%.
You can view the confidence level in your Console-Settings, however, you cannot manually change this. We customize every confidence level based on use-case and activity. To change the confidence level, please contact us.
The recommended codec is PCM (wav RIFF) with 44.1KHz to 8KHz sample rate, 1 or 2 Channels, 48 to 8 Bits. However, the following codecs are supported: 8svx aac alac aif aifc aiff aiffc al amb au avr cdda cdr cvs cvsd cvu dat dvms f32 f4 f64 f8 fssd gsm gsrt hcom htk ima ircam la lpc lpc10 lu maud mp2 mp3 nist prc raw s1 s16 s2 s24 s3 s32 s4 s8 sb sf sl sln smp snd sndr sndt sou sox sph sw txw u1 u16 u2 u24 u3 u32 u4 u8 ub ul uw vms voc vox wav wavpcm wve xa.