The intelligibility of the communication is affected by the disturbance of the intonation, rhythm and flow of speech on which the language of the vocabulary puts its mark and the poverty of the voice in deaf or demutised children. Uncertainty in expression is also due to changes in flexible words, topical, syntactical and semantic variations. The Appropriation of the grammatical structure of the tongue by deaf children is not made on the path of simple automation by itself, but implies a permanent intervention of thought in order to carry out analyses and summaries of the linguistic material presented.  The overload Elements of speech such as intonation, intensity, frequency, duration, pause, rhythm, emphasis are essential in the process of communication.  They play an important role in the process of speech understanding as they provide the listener with information about the communication intentions of the one who speaks such as differentiating between an affirmative statement and an interrogative or imperative, differentiation Between two parts of speech.