When we speak we produce a stream of sound, which is extremely difficult to examine because it is continuous, rapid and soon gone.
‘man’ [ m ] [ æ ] [ n ]
PHONETIC TRANSCRIPTION is a phonetic alphabet is based on the principle of one letter per sound.
Systems of phonetic transcription:
Trager-Smith transcription represents American pronunciation.
is a sound that needs an open air passage in the mouth
is formed when the air stream is restricted or stopped at some point between the vocal cords and the lips.
Acoustics phonetics is the study of how speech sounds are transmitted.
Auditory phonetics is the study of how speech sounds are heard
Articulatory phonetics is the study of how speech sounds are produced by the human apparatus.
The upper part of the mouth is places or points of articulation
The resulting opening is called the manner of articulation of the speech sound.
The lower part of the mouth as articulators.
PLOSSIVE
These involve complete closure at some point in the mouth.
In English, three types of closure occur resulting in three sets of plosives
it can be made by pressing against the closed-double lips
it can be made by the tongue pressing against the alveolar ridge
it can be made by the back of the tongue pressing against the soft palate
FRICATIVES
These sounds are the result of incomplete closure at some point in the mouth.
In English, there are two types of Fricatives:
If you approximate the upper teeth to the lower lip and allow the air to escape.
If you approximate the tip of the tongue to the alveolar ridge
In English, the initial /l/ sound in ‘light’ is a lateral; so is the final sound in ‘full’
These sounds involve the complete closure of the mouth and the air is passing through the nasal cavity;
The three nasals in English are /m/ as in ‘mat’, /n/ as in ‘no’ and /ŋ/ as in ‘sing’.
Affricates are a combination of sounds.
Initially there is complete closure as for a plosive, then followed by a slow release with friction, as for fricative.
The symbols are represented by /t∫/ in ‘chop’, and /dʒ in ‘judge’.
The sounds made without closure in the mouth and they are vowel-like.
The semi-vowels are represented by the symbols /j/ as in ‘you’ and /w/ as in ‘wet’.
Where the tip or the blade of the tongue comes in contact with the upper teeth as in /θ/ ‘thief’ and /ð/ ‘then’.
Where the tip or blade of the tongue touches the alveolar ridge which is directly behind the upper teeth.
The most frequently occurring consonants /t, d, s, z, n, l, r/ are all made by approximating the tongue to the alveolar ridge.
There are two points of contact for these sounds. The tip of the tongues is close to the alveolar ridge while the front of the tongue is concave to the roof of the mouth.
The front of the tongue approximates to the hard palate.
In English the only palatal is the voiced semi-vowel /j/ as in ‘you’.
The back of the tongue approximates to the soft palate.
In English there are four consonants made in the velar region, the plosives /k, g/ , the nasal /ŋ/ and the voiced semi-vowel /w/ as in ‘woo’.