CCF20100216 004
12 English Phonetics and Phonology
ii) In making the two vowels described above, it is the front part of the tongue that is raised. We could therefore describe i: and m as comparatively front vowels. By changing the shape of the tongue we can produce vowels in which a different part of the tongue is the highest point. A vowel in which the back of the tongue is the highest point is called a back vowel. If you make the vowel in the word calm’, which we write phonetically as a:, you can see that the back of the tongue is raised. Compare this with as in front of a mirror; as is a front vowel and a: is a back vowel. The vowel in ‘too’ (u:) is also a comparatively back vowel, but compared with a: it is close.
So now we have seen how four vowels differ from each other; we can show this in a simple diagram.
|
Front |
Back | |
|
Close |
i: |
u: |
|
Open |
as |
a: |
However, this diagram is rather inaccurate. Phoneticians need a very accurate way of classifying vowels, and have developed a set of vowels which are arranged in a close-open, front-back diagram similar to the one above but which are not the vowels of any particular language. These Cardinal vowełs are a standard reference system, and people being trained in phonetics at an advanced level have to learn to make them accurately and recognise them correctly. If you learn the Cardinal vowełs, you are not learning to make English sounds, but you are learning about the rangę of vowels that the human vocal apparatus can make, and also learning a usefiil way of describing, classifying and comparing vowels. They are recorded on Track 21 of CD 2.
It has become traditional to locate Cardinal vowels on a four-sided figurę (a quadri-lateral of the shape seen in Fig. 4 - the design usęd here is the one recommended by the International Phonetic Association). The exact shape is not really important - a square would do quite well - but we will use the traditional shape. The vowels in Fig. 4 are the so-called primary Cardinal vowels; these are the vowels that are most familiar to the speakers of most European languages, and there are other Cardinal vowels (secondary Cardinal vowels) that sound less familiar. In this course Cardinal vowels are printed within square brackets [ ] to distinguish them clearly from English vowel sounds.
Front Central Back
Fig. 4 Primary Cardinal vowels
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