Police departments and courts of law may use voice identification to identify individuals by the time, frequency, and intensity of their speech-sound waves. They record these waves in graph form using a sound spectrograph, and the spectrograph electronically produces a spectrogram.

What machine is used to match Voiceprints?

The sound spectrograph records a voiceprint in terms of the frequencies and intensities of the sounds made by an individual while speaking.

What information is included in a voiceprint?

Defined as a biometric-based signature, voiceprints can be used to identify a speaker positively on the basis of physical characteristics, namely the specific configuration of vocal cavities (throat, naval cavities, and mouth) and articulators (lips, teeth, tongue, and soft palate).