Introduction to the vowels of English. part 1
A vowel is one of the
two principal classes of speech sound, the other being a consonant. Vowels vary in quality, in loudness and also in quantity
(length). They are usually voiced, and are closely involved in prosodic variation such
as tone, intonation and stress. Vowel sounds are produced with an open vocal
tract. The word vowel comes from the Latin word vocalis, meaning "vocal" (i.e. relating to the
voice). Vowels are also called vociods.
Phonetically,
vowels are defined as speech segments which are produced with no obstruction in
any part of the vocal tract; there is free flow of air from the lungs when
vowel sounds are produced. On the other hand, phonemically, vowels are describe
in terms of syllables (units of speech sound that can be produced within a
single breath effort), that is, the sound that form the peak of the syllables.
There are 20 vowel
sounds in the English sound system. These sounds are classified into 12
monophthongs and 8 diphthongs. The table is an illustration of the English
vowel system.
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