English vowel sounds
Vowels are produced without a complete obstruction of the airflow. The traditional British English phonemic chart presents 12 monophthongs and 8 diphthongs.
Monophthongs
The vowel quality stays relatively steady, as in sleep /iː/, slip /ɪ/, food /uː/ and cup /ʌ/.
Diphthongs
The tongue and mouth move from one vowel quality towards another, as in game /eɪ/, toy /ɔɪ/, mine /aɪ/ and how /aʊ/.
