Patent US 4,397,635

A reading teaching system for use with an audio-visual projection device. Lines of a textual passage are displayed in the baseline display portion of a display area. As each word is spoken the corresponding word in the baseline display portion is also displayed in the main display portion of the display area. Several speech parameters are conveyed by the manner in which the chosen word is displayed. The loudness or volume is represented by the size of the chosen word while the pitch is represented by the height of the chosen word above the baseline display portion. The speed at which each word is spoken is indicated by the spacing of the letters of the chosen word in the main display portion. The temporal spacing between the words is indicated by the spacing between the chosen words in the main display area. Other speech parameters, such as mood, can be indicated by special coloration or configuration of the illustrated chosen word.