Patent ID: 6525717
Filing Date: 2003-02-25
Classification: G06F

Abstract:
An alpha-numeric character entry device comprising:a plurality of substantially parallel, spaced rows of acoustic sensors, each of said acoustic sensors being associated with a set of alpha-numeric characters, at least one of said acoustic sensors receiving an input alpha-numeric character characterized by an acoustical signature, said acoustical signature corresponding to a specific alpha-numeric character of said set associated with said at least one acoustic sensor, each of said sensors having an output which provides an electrical signal representative of said input; a signal processor operatively connected to said output; and a display for displaying at least one set of characters associated with at least one acoustic sensor, said input alpha-numeric character and at least one previously input alpha-numeric character; wherein said signal processor determines at least one spectral characteristic of said acoustical signature, determines which of said specific characters said acoustical signature corresponds to and the set of characters to which said specific character is a part of, and provides an output representative of said specific character corresponding with said acoustical signature and the set of characters to which said input character is a part of.