There are two basic types of biometric categories which can be used to uniquely identify individuals in an almost foolproof manner. Those two ways are physiological and behavioral. Some physiological methods of biometric identification are familiar and have been in use already for many years. Fingerprints are the best and perhaps oldest example, but today with computer programs biometric analysis has come to include face recognition, DNA, palm print, iris recognition and hand geometry. In the case of voice recognition there is a small distinction which applies putting this type of recognition into the behavioral category rather than the physiological. Since each person has a different voice according to their biology, the voice should be considered a physiological characteristic. However, because what is really studied in voice recognition is the way the person speaks, and not strictly his voice. Since the way a person speaks is behavioral, voice recognition is placed in the behaviometric category.
Behavioral biometric parameters include typing rhythm, the way a person walks (their gait) and voice recognition. Behavioral biometrics is often referred to as behaviometrics.