پایگاه آموزش زبان انگليسي معصوم پور

International Phonetic Alphabet,  (IPA), an alphabet developed with the intention of enabling students and linguists to learn and record the pronunciation of languages accurately, thereby avoiding the confusion of inconsistent, conventional spellings and a multitude of individual transcription systems. One aim of the IPA was to provide a unique symbol for each distinctive sound in a language—that is, every sound, or phoneme, that serves to distinguish one word from another.

http://www.britannica.com/