ABSTRACT
Speech therapists have the necessary “expertise” for evaluating the defects of voice, speech and language due to factors other than signs and symptoms as defined in medical terminology. Human beings are needed to work apparatus and interpret its information. Complete diagnosis and evaluation require a huge team of experts, with or without costly and complex instruments. The whole team may be required in each case for purposes of research though it is very doubtful that this would be so in each and every case. The patient who seeks treatment must not be subjected to a series of investigations regardless of their relevance unless, exceptionally, he agreed to be a subject for research. The phonetic characteristics of the speech of children whose impaired hearing has prevented them from receiving accurately the patterns of sound emitted by others differ from those of children who, though able to receive the signals, fail to apprehend them. In the former, output matches input.
