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Voiceprint Analysis

Voice & Sound

The sound of each individual’s voice is entirely unique not only because of the actual shape and size of an individual’s vocal cords but also due to the size and shape of the rest of that person’s body, especially the vocal tract, and the manner in which the speech sounds are habitually formed and articulated.

Humans have vocal folds that can loosen, tighten, or change their thickness, and over which breath can be transferred at varying pressures. The shape of chest and neck, the position of the tongue, and the tightness of otherwise unrelated muscles can be altered. Any one of these actions results in a change in pitch, volume, timbre, or tone of the sound produced.

Sound also resonates within different parts of the body, and an individual’s size and bone structure can affect somewhat the sound produced by an individual.

The vocal folds, in combination with the articulators, are capable of producing highly intricate arrays of sound. The tone of voice may be modulated to suggest emotions such as anger, surprise, or happiness.