Phonetics as a science Branches of phonetics Aspects of the sound matter of language Components of the phonetic system of language National and regional pronunciation variants of english British and american pronunciation models The articulator classification of english vowels The articulator classification of English consonants Phoneme as many sided dialectic unity of language types of allophones distinctive and irrelevant features of the phoneme Main phonological schools The system of vowel phonemes problems of diphthongs Modifications of English consonants and vowels in speech Alternations of speech sounds in English Word stress in English Components of intonation and the structure of English intonation group