Dimorphism is the property of voice that is highly observed in human beings. Intonation, speech rate, and duration are certain
characteristics that distinguish human voices . 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. (It is this latter aspect of the sound of the
voice that can be mimicked by skilled performers.)
