Divisions of Speech Sounds

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Broadly, speech sounds are classified into consonants and vowels. It is an universal rule for language. This classification in according to how the exhaled breath is shaped or interfered with by the speech organs at different places along the vocal tract. Both consonants and vowels refers to two classes of speech sounds. Their difference is one of the manner in which the out going air stream is interfered with or modified. However, English has also other kind of speech sound which is derived from vowels ; dipthongs

- The Degree of Lips Rounding.

In producing vowel sound, the lips may be rounded, spread or neutral. In in describing English vowel sounds, however the use of lip position is rather superfluous, since lip position is predictable in term which part of the tongue is raised. It means that the degree of lip rounding for the back series of vowels paralleled by the degree of raising the tongue : when the tongue is highest in the mouth, the lips are extremely rounded.

According to this way, vowel sounds can be divided into two classifications. They are Rounded and Unrounded vowels.

- Rounded Vowels are vowels produced in the formation of which the lips are

drown together so that the opening between them is more or less round.

The sounds are : / o / and /

- Unrounded Vowels are the vowels produced in the formation of which the lips are in the neutral position or the lips are spread out.

The sounds are : /l : /, /i / , / e /, / æ / and / a: / .

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