This thesis begins with a study at the Instituto Nacional de Educação dos Surdos (Brazilian Institute of Deaf Education) examining the visual messages of computer-based game of speech training for deaf children. The game, known as Jogos de Voz, developed by DS Antonio Marcos de Lima Araújo, as his thesis at the Laboratory of Digital Processing Speech, of the College of Electric Engineering and Computation of UNICAMP, consists of the visual feedback of the player`s speech. That is, while the children exercise their articulatory coordination on the computer microphone, they run through a graphical and illustrative reply in real time on the computer screen. The child sees what he or she is speaking. Of the fourteen modules of the Games of Voice that have been played by children aged 6 to 12 years, in regular sessions, during one year, in the Division of Fonoaudiologia (DIFON) of the INES the two most played modules in this period were selected for analysis. Evaluation of games of visual feedback for deaf children, that they seek to represent visually what occurs at the moment when speech is being produced, indicates that design exerts determinative role in reaching the game`s proposed objectives.