Diphthongs
Eight english diphthongs:
WHAT IS A DIPHTHONG? A diphthong is a sequence of two vocalic elements that form a glide within the same syllable. They may be said to have a first element (STARTING POINT) and a second element (THE POINT IN THE DIRECTION OF WHICH THE GLIDE IS MADE)
PHONETIC FEATURES
In order to describe English diphthongs from the ARTICULATORY point of view we must take into consideration:
1. The vowel towards which the glide is made:
FRONT diphthongs because the glide is made towards the front vowel.
BACK diphthongs because the glide is made towards the back vowel.
CENTRING diphthongs because the glide is made towards the central vowel.
2. The direction of the glide towards a CLOSER tongue position or CENTRING position:
• CLOSING diphthongs: the glide is made towards a closer tongue position.
• CENTRING diphthongs: the glide is made towards a central position.
3. The LENGTH of the glide:
WIDE diphthongs because the glide is LONG.
NARROW diphthongs because the glide is SHORT.
4. Length of diphthongs: they are equivalent in length to long pure vowels and are subject to pre-fortis clipping. The first element is the one affected in this case.
5. Lip position: the elements of the diphthong tend to retain the positions they present as pure vowels.
• From the AUDITORY point of view we must take into account the prominence of the elements. English diphthongs are generally FALLING, that is to say: • the first element of the diphthong is more prominent than the second element, which is slightly sounded. • (In rising diphthongs the second element is more prominent than the first)
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