We wonder how it is possible to use the Electroencephalogram (EEG) as a TA instrument, rather than a diagnosis procedure, to evaluate how children hear the sounds. The first concern was related to the definition of concepts, namely the primary and secondary objectives, the importance of the study, the materials and equipment, the procedures, the criteria for inclusion and exclusion and the expected outcomes. We present the main research questions, the proposed methodology and report the first steps of the practical work, some results and a few considerations about the thesis next development.