Voice biometrics identifies individuals by their voice. Users provide voice samples which are recorded and analyzed by the system. The system compares the voice to the voice prints on file for identification. It is difficult to fool and is not compromised by colds, but can be confused by intense emotions.
Voice biometrics is an area of biometrics that focuses on identifying individuals by voice, or voice print as it is sometimes known. Biometrics in general involves measuring unique biological characteristics for the purpose of comparing unknown samples with known samples, usually with the goal of confirming someone’s identity. This technology has attracted much attention in many regions of the world because it has potential for the security industry and other areas of human endeavor.
For a voice biometrics system, people need to be logged into the system. People sign up by providing voice samples which are recorded and analyzed by the system. The more samples the system has, the more effective it will be, because having more samples allows the system to explore pitch, pitch, speech patterns, accents in speech, and so on. A variety of samples can reduce the risk of a false rejection by capturing more of the natural variation in an entry.
When a registered person speaks into a voice biometrics system for identification purposes, the system compares the voice to the voice prints it has on file. If it finds a match, it will indicate that the person has been recognized and identified. A display can show details about the person, and the system can also activate a door lock or similar device to allow someone to pass into a safe area.
When someone who is not signed up approaches the system, the system should reject the individual after comparing the entry to the printouts on file. An interesting thing about voice biometrics systems is that they are extremely difficult to fool, as most have a higher false rejection rate than a false positive rate. Even if someone mimics someone else’s voice, the system can usually pick up on the differences. It can also identify recordings that sound different to live vocals.
Biometric identification with a voice biometrics system is usually not compromised by colds, colds, etc., because the underlying patterns of the voice are preserved. Laryngitis or major throat surgery can sometimes alter the voice enough for the system to reject the person until they recover, and in some cases, permanent voice changes may result in the need for a re-enrollment. These systems can also sometimes become confused if someone is angry, stressed, or experiencing other intense emotions when speaking for the system, as the voltage can change voice patterns enough to make voice biometrics uncertain as to the speaker’s identity.
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