The paper identifies and defines augmentative and alternative communication, a new sub-discipline in applied linguistics whose primary parametre is linguistic competence whereas the secondary parameter is the phenomenon of speech inability and speech non-occurrence.At the same time it has been proven that underwater treasures sunken medallion linguistics of augmentative and alternative communication conducts primary, applied and implementation research having a hierarchical layout of scientific aims.It also enables to conduct a logopaedic 2004 honda civic exhaust system analysis of mute and non-speaking persons.The postulates that govern it are presented in the last part of the text.