Тhe Оrgans of Speech and their Work
Мета: to find out about organs of speech.
Короткі теоретичні відомості
The air stream released by the lungs goes through the windpipe and comes to the larynx, which contains the vocal cords. The vocal cords are two elastic folds which may be kept apart or brought together. The opening between them is called the glottis. This is the usual state of the vocal cords, when we breathe out. If the tense vocal cords are brought together, the air stream forcing an opening makes them vibrate and we hear some voice.
There is one more state of the vocal cords which results in the glottal stop. When the vocal cords are brought close together and then opened suddenly by the air stream there comes a sort of coughing noise, a kind of the 'click' of the vocal cords. This sound is called the glottal stop.
On coming out of the larynx the air stream passes through the pharynx.
The pharyngal cavity extends from the top of the larynx to the soft palate, which directs the air stream either to the mouth or nasal cavities, which function as the principal resonators.
The soft palate can be easily seen in a hand mirror. Looking into the mirror you will see the soft palate, the very end of which is known as the uvula. The soft palate can easily move. When the soft palate is in its lowered position the air goes up into the nasal cavity and then out through the nose. This is the usual position of the soft palate when we breathe through the nose. This is also the position for the nasal sounds [m, n, ŋ]. If you nip your nose you cannot pronounce these sounds. But as soon as you release the nose the air will continue its way and you will hear the sounds again. When the soft palate is raised the uvula forms a full contact with the back wall of the pharynx and the air stream goes through the mouth cavity. This is the most typical position of the soft palate for most of the sounds of many languages.
The soft palate is the furthest part of the palate from the teeth. Most of the palate is hard. This hard and fixed part of the palate is divided into two sections: the hard palate (the highest part of the palate) and the teeth ridge or alveolar ridge (the part immediately behind the upper front teeth). You can touch the teeth ridge with the tongue tip. The teeth ridge is very important in English as many consonants are formed with the tongue touching or close to it. If you still move the tip of the tongue forward you will feel the teeth.
The lower teeth are not very important for making speech sounds, while the upper teeth take part in the production of many of them.
The most important organ of speech is the tongue. Phoneticians divide the tongue into four sections, the part which lies opposite the soft palate is called the back of the tongue; the part facing the hard palate is called the front; the one lying under the teeth ridge is known as the blade and its extremity the tip. By the central part of the tongue we mean the area where the front and back meet. The edges of the tongue are known as the rims. The tongue may lie flat or move in the horizontal or vertical directions. It can also change its shape so that the sides are curved up forming a groove.
The lips can take up various positions as well. They can be brought firmly together or kept apart neutral, rounded, or protruded forward.
All the organs of speech can be divided into two groups:
(1) active organs of speech, movable and taking an active part in the sound formation: (a) the vocal cords which produce voice; (b) the tongue which is the most flexible, movable organ; (c) the lips affecting very considerably the shape of the mouth cavity; (d) the soft palate with the uvula, directing the stream of air either to the mouth or to the nasal cavity; (e) the back wall of the pharynx contracted for some sounds; (f) the lower jaw which movement controls the gap between the teeth and also the disposition of the lips; (g) the lungs providing air for sounds;
(2) passive organs of speech (a) the teeth; (b) the teeth ridge; (c) the hard palate and (d) the walls of the resonator.
Завдання до теми
Read the tongue-twisters:
1. A cupcake cook in a cupcake cook’s cap cooks cupcakes.
2. A dozen double damask dinner napkins.
3. A fat thrush flies through thick fog.
4. A flea and a fly flew up in a flue. Said the flea, «Let us fly!» Said the fly, «Let us flee!» So they flew through a flaw in the flue.
5. A fly and flea flew into a flue, said the fly to the flea ‘what shall we do?’ ‘let us fly’ said the flea said the fly ‘shall we flee’ so they flew through a flaw in the flue.
6. A gazillion gigantic grapes gushed gradually giving gophers gooey guts.
7. A gentle judge judges justly.
8. A haddock! A haddock! A black-spotted haddock! A black spot On the black back Of a black-spotted haddock!
9. A knapsack strap.
10. A lady sees a pot-mender at work at his barrow in the street. «Are you copper-bottoming them, my man?» «No, I’m aluminiuming ‘em, Mum»
Контрольні питання
1. The direction of the air stream released from the lungs.
2. Three different states of the vocal cords.
3. The position of the soft palate which influences the direction of the air stream.
4. The parts of the palate.
5. The parts of the tongue.
6. The position of the movable organs of the mouth, i.e. the shape of the lips and tongue.
7. The active and passive organs of speech and their role in the sound formation.
Література: [4, c. 8-11].
Практичне заняття № 3
Тема. Артикуляційна база англійської мови