Phonetics is the study of the minimal
units that make up language.
For spoken language, these are the
sounds of speech-the consonants, vowels, melodies, and rhythms.
There
are three types of the study of the sounds of language.
1. Acoustic Phonetics
is the study of the physical properties of sounds.
2. Auditory Phonetics
is the study of the way listeners perceive sounds.
3. Articulatory Phonetics
is the study of how the vocal tracts produce the sounds.
This
article will only describe articulatory phonetics.
Some
speakers of English pronounce the words which and witch differently, but
if you pronounce both words identically, just use w for both words. The sounds
/ʌ/ and /ə/ are pronounced the same, but the former is used in stressed
syllables, while the latter is used in unstressed syllables.
The
production of any speech sound involves the movement of air. Air is pushed
through the lungs, larynx (vocal folds) and vocal tract (the oral and
nasal cavities.) Sounds produced by using air from the lungs are called pulmonic
sounds. If the air is pushed out, it is called egressive. If the
air is sucked in, it is called ingressive
Consonants
Consonants are produced as air from the lungs is pushed through the
glottis (the opening between the vocal cords) and out the mouth. They are
classified according to voicing, aspiration, nasal/oral sounds, places of
articulation and manners of articulation.
Places of Articulation
Bilabial: lips together
Labiodental: lower lip against front teeth
Interdental: tongue between teeth
Alveolar: tongue near alveolar ridge on roof of mouth (in between teeth
and hard palate)
and etc
Manners of Articulation
Stop: obstruct airstream completely
Fricative: partial obstruction with friction
Affricate: stop airstream, then release
Liquids: partial obstruction, no friction
Glides: little or no obstruction, must occur with a vowel
You should practice saying the
sounds of the English alphabet to see if you can identify the places of
articulation in the mouth. The sounds are described by voicing, place and
then manner of articulation, so the sound /j/ would be called a voiced
palatal glide and the sound /s/ would be called a voiceless alveolar
fricative.
Classifying
the Vowels Sounds of English
The classifcation of vowels is based
on four major aspects:
1. Tongue
height - according to the vertical
position of the tongue (high vowels, also referred to as close; low vowels,
also referred to as open; intermediate - close-mid and open-mid)
2. Frontness
vs. backness of the tongue
- according to the horizontal position of the highest part of the tongue.
3. Lip
rounding - whether the lips are rounded
(O-shape) or spread (no rounding) when the sound is being made.
4.
Tenseness
of the articulators
- refers to the amount of muscular tension around the mouth when creating vowel
sounds. Tense and lax are used to describe muscular tension.