Классификация английских гласных звуков?

есть, вот правда на русском
http://www.native-english.ru/pronounce/classification
хотя это не то что вам точно надо,
это в учебнике фонетики есть, хотя не помню в каком, но у вас должен быть, если вы студентка)

Ох... ФОНЕТИКА... как "давно" это было! =) побыстрей никак, придется тетради с лекциями поднимать=))0

1 The position of the tongue. According to the horizontal movement Russian phoneticians distinguish five classes: 1) front; 2) front-retracted; 3) central; 4) back; 5) back-advanced.
British phoneticians do not single out the classes of front-retracted and back-advanced vowels. So both [i:] and are classed as front, and both [u:] and [Y] are classed as back
5 Stability of articulation. This principle is not singled out by British and American phoneticians. Thus, P. Roach writes: "British English (BBC accent) is generally described as having short vowels, long vowels and diphthongs". According to Russian scholars vowels are subdivided into: a) monophthongs (the tongue position is stable); b) diphthongs (it changes, that is the tongue moves from one position to another); c) diphthongoids (an intermediate case, when the change in the position is fairly weak).

7 Character of the vowel end. This quality depends on the kind of the articulatory transition from a vowel to a consonant. This transition (VC) is very closed in English unlike Russian. As a result all English short vowels are checked when stressed. The degree of checkness may vary and depends on the following consonants (+ voiceless - voiced - sonorant -).