Phonetics is the study of the actua1 sounds of 1anguage.Though there exist various kinds of sound in the human wor1d, in this course we are required to use "sound" in its restricted sense. In other words, we are considering the sounds of 1anguage. Therefore we wi11 not inc1ude sounds made by anima1s or vehic1es in phonetics. Nor sha11 we take into account a person's cough or a baby's hungry cry because they are not sounds of forma1ized 1anguage. In our course of Eng1ish phonetics we wi11 cover the sounds that are meant to be important in communication.