12. The system of claim 9 , wherein a second visual representation of frequency relationships within a previously recorded word is generated using said method, said second visual representation being displayed simultaneously on said display with said first visual representation.
9. An identity verification system, comprising: a sound input device; a processing device operatively coupled to said sound input device; and a display operatively coupled to said processing device; wherein: said processing device executes computer readable code to create a first visual representation of frequency relationships within a spoken word sensed by the sound input device for output on the display; wherein: said first visual representation is evaluated to determine the identity of the person speaking said spoken word; and wherein: said first visual representation is generated according to a method comprising the steps of: (a) labeling the perimeter of a circle with a plurality of placing twelve labels in a pattern of a circle, said twelve labels corresponding to a plurality of equally spaced frequency intervals twelve respective frequencies in an octave, such that moving clockwise or counter-clockwise between adjacent ones of said labels represents a first frequency interval; (b) identifying an occurrence of a first frequency within the spoken word; (c) identifying an occurrence of a second frequency within the spoken word; (d) identifying a first label corresponding to the first frequency; (e) identifying a second label corresponding to the second frequency; (f) creating a first line connecting the first label and the second label, wherein: (1) the first line is a mixture of a first color and a second color if the first frequency and the second frequency are separated by more than the first frequency interval and less than a first multiple of the first frequency interval; (2) the first line is a mixture of a second color and a third color if the first frequency and the second frequency are separated by more than the first multiple of the first frequency interval and less than a second multiple of the first frequency interval; (3) the first line is a mixture of a third color and a fourth color if the first frequency and the second frequency are separated by more than the second multiple of the first frequency interval and less than a third multiple of the first frequency interval; (4) the first line is a mixture of a fourth color and a fifth color if the first frequency and the second frequency are separated by more than the third multiple of the first frequency interval and less than a fourth multiple of the first frequency interval; (5) the first line is a mixture of a fifth color and a sixth color if the first frequency and the second frequency are separated by more than the fourth multiple of the first frequency interval and less than a fifth multiple of the first frequency interval.