PHONETICS: is the study of human sounds in
general without saying what function which sounds may have in a particular
language The term ‘phonetics’ is, however, often used with reference to one
language when the emphasis is on the pronunciation of this language. For
instance, a book on The phonetics of Irish would be about how to
pronounce Irish correctly and not necessarily about the functions which the
sounds may have in the phonological system of the language.
Phonetics was studied by the 4th century B.C,E. But
started growing in the late 19th century due to the invention of phonograph. Studding phonetics
involves not only learning theoretical material but also undergoing training in
the production of speech sound, student must also learn to control of articulator
variables. So it will help them develop the ability to recognize the different
between the vowel and consonants, and
also become expert in using phonetic symbol, those of the international
phonetic alphabet(I.P.A)
Where symbols appear in pairs,
the one on the right represents a voiced consonant, while the one on the left
is unvoiced. Shaded areas denote articulations judged to be impossible.
It is customary to
divide the field of phonetics into three branches as follows.
Articulator phonetics (emission of sounds)
Acoustic phonetics (transmission of sounds)
Additive phonetics (reception of sounds)
ARTICULATORY PHONETICS
This describes how vowels and consonant are produced or
“articulated” in various part of the mouth and throat. It is the study of
production of speech sounds. To produce speech, air
must flow from the lungs through the vocal tract, which includes
the vocal folds (popularly called the vocal cords, though they are more
like thick elastic bands than strings), the nose or nasal cavity, and
the mouth or oral cavity (See Figure 1). The vocal folds vibrate for
some sounds but not for others. Air flows through the nose for certain sounds
but not others. But the main creator of speech sounds is the mouth. The
production of vowels sounds and the production of consonants sounds differs
from each other when it comes to articulation.
Vowels
Vowels include the sounds we ordinarily represent as the letters <a, e, i,
o, u>, as well as a number of other sounds for which the ordinary alphabet
has no unique symbols. Vowels are distinguished from consonants in several
ways, consonants are produced by constricting the air stream to various degrees
as it flows through the oral tract. Vowels are produced with a smooth, unobstructed
airflow through the oral tract. Differences in vowel quality are produced by
different shapes of the oral cavity. Characteristic vowel qualities are
determined by
the height of the tongue in the mouth
the part of the tongue raised (front, middle, or back)
the configuration of the lips; and
the tension of the muscles of the oral tract.
CONSONANTS
Consonants include
the sounds we represent as <p, b, t, d, m, n, f, v, s, z, l, r, h> in the
ordinary alphabet. All consonants are produced by entirely or almost
entirely stopping the air stream coming from the lungs. When we almost entirely
stop the air stream we force it through such a narrow opening that the airflow
at that point is turbulent and noisy. We classify consonants according to the
following characteristics: (a)whether or not the vocal folds are vibrating (voicing);
(b) whether the sound is made with a fully stopped or merely constricted air stream (its manner of articulation); (c) where in the mouth the
stoppage or constriction is
made (its place of articulation); (d) whether or not air is flowing
through
the nasal cavity (nasality); and (e) whether or not the lips are pursed
(lip-rounding).
Voicing
Sounds produced with vibrating vocal folds are said to be voiced;
those produced without vocal cord vibration are voiceless. Table 1 lists
the voiced and voiceless consonants of English. The letters in [ ] are the phonetic
symbols for the sounds.
NASALITY
Make the sound represented by <m> in the word Pam and continue it for
some seconds. As you continue it, pinch your nose and observe what happens to
the sound. It should stop immediately. This shows that air was flowing through
your nose as you produced this sound. Now try the same little experiment with
the <n> of pan and the <ng> of pang. You should find that
the air flows through the nose in these two cases also. Sounds in which air flows
through the nose are called nasal sounds. The air is allowed into the
nose by lowering the velum, the soft palate at the back of the mouth.
English has three main nasal sounds:
Manner of articulation
By manner of articulation we mean the kind of closure
or constriction used in making the sound. We classify English consonants
according to three manners of articulation: stops (full stoppage of the air stream somewhere in the oral cavity between the vocal folds and the
lips, as in [p], [b], [m]); fricatives (constriction of the air stream in
the oral cavity producing turbulence and noise, as in [f], [v]); affricates (full
stoppage of the air stream followed immediately by constriction, as in [tS], [dZ]).
Table 2 summarizes the different manners of articulation.
Place of articulation
by place of articulation we mean the area in the mouth at which
the consonantal closure or constriction occurs. English uses only seven places
of articulation (see Figure 1) which we describe and illustrate below.
Bilabial sounds are made by bringing both lips together to stop the airstream:
Labiodental sounds are made by bringing the top
teeth into contact with
the bottom lip and forcing air between the two to create the fricatives:
Interdental sounds are made by placing the tip of
the tongue between
the top and bottom teeth and forcing air through. Again, these are both
fricatives:
Alveolar sounds are made by bringing the
tongue and the alveolar ridge
(the bony ridge just behind the top teeth) together to create either a stop or
fricative:
(Alveo-)palatal sounds are made by bringing the blade
of the tongue to,
or close to, the alveo-palatal area of the roof of the mouth to create fricatives
and affricates:
Velar sounds are created by stopping the air stream by bringing the back
of the tongue into contact with the velum:
Glottal sounds are created by either
narrowing the vocal folds sufficiently to create a fricative or closing them to
create a stop:
Acoustics Phonetics
This is the study of how speech sounds are transmitted: when
sounds travels through the air from the speakers mouth to the hearers ear it
does so in form of vibrations in the air; it is the study of physical production
and transmission of speech sounds. Spectrographs are the visual representation
of acoustical information. The display concentrations of physical energy in the
spoken signal. These concentration, which shows up as dark bands, are called formants. Multiple formants make up
each intelligible speech sound.
AUDITORY PHONETICS
This is the study of how speech is perceived: looks at the
way in which the hearer’s brain decodes the sound waves back into the vowels
and consonants originally intended by the speaker. It is the study of
perception of speech sounds. The actual sound produced, such as a simple vowel
or consonant sound is called phone.
PHONOLOGY
The word phonology came from Ancient
Greek. PHONOLOGY can also refer to the phonological system of a given
language,it is also one of the fundamental system which a language is
considered like syntax and it its vocabulary.
Phonology describes the way sound
function within a given language to encode meaning for many linguist.Phonology
belongs to a descriptive linguistics.
Phonology
is the study of sound patterns,especially different pattern of sound in
different language.Phonolgy is a branch of linguistics concerned with the
systematic organization of sound in language. Phonology
deals with the way speech sounds behave in particular languages or in languages
generally. This focuses on the way languages use differences between sounds in
order to convey differences of meaning between words. Phonology also include the study of
equivalent non oral languages such as ASL.
Some term to take note in phonology
include:
Phone: This is the smallest unit of human
sound which is recognizable but not classified. The delimiters used are square
brackets: [ ]. Examples: [p], [i:], [t] all three of which are found in peat.
Phones are unclassified in that nothing is said of their function in the sound
system of a language.
Phoneme: The smallest unit of language which
distinguishes meaning – the organizational unit of phonology – is termed a
phoneme. The brackets used are slashes: / /. Examples from English are: /k/,
/u:/, /l/, as seen in the word cool /ku:l/. Both consonants and vowels
are phonemes, for instance /i:/, /ai/, /u:/, /au/ are phonemes in English and
can be seen in beat, bite, boot, bout respectively. The distribution of
phonemes in English is fairly regular (see consonant and vowel charts below),
the consonants tend to come in pairs of voiced and voiceless members and the
vowels in sets of long and short vowels.
The phoneme
is an abstract term (a speech sound as it exists in the mind of the speaker)
and it is specific to a particular language. e.g in English the /p/ sound is
phoneme because it is the smallest unit of sounds of bill,till or drill making
the word pill. The vowel sound of pill is also a phoneme because its
distinctness in sound makes pill, which means one thing, sound different from
pal, which means another. Minimal pairs are pairs of words that have one
phonological element that is different.
Examples of minimal pairs
lit – light
|
read – red
|
sing – sang
|
bed – bad
|
saw – sought
|
boot – boat
|
soot – suit
|
but – boot
|
why – way
|
know – now
|
wreath – wreathe
|
leak – lick
|
look – luck
|
sock zx- suck
|
vest – vast
|
cod – card
|
dug – dog
|
thirst – first
|
fair
– fear
|
pay
– bay
|
read
– lead
|
need
– mead
|
zoo
– sue
|
near
- ne'er
|
catch
– cash
|
azure
– assure
|
jet
– chet
|
leige
– lease
|
whistle
– thistle
|
beige
– bays
|
fur
– fear
|
care
– chur
|
noon
– nun
|
A phoneme may have several allophones, related
sounds that are distinct but do not change the meaning of a word when they are
interchanged. The sounds corresponding to the letter "t" in the
English words 'tea' and 'trip' are not in fact quite the same. The position of
the tongue is slightly different, which causes a difference in sound detectable
by an instrument.
Overlapping distribution:
when we find phonetic environments (the sounds before and after)where both
phones occur.[p] and [b] in ‘’pat’’ and ‘’bat’.
Complementary
distribution: when we find no overlapping phonetics environments. They are
allophones of the same phoneme.[pʱ]
and [p] in ‘’pin’’ and ‘’spin’’.
PHONETICS AND PHONOLOGY
Phonetics and phonology are related in language. Phonetics is
the study of sound in speech, Phonology is the study of sound patterns to
create meaning. Phonetics focuses on how speech is physical created and
received, including the study of human vocal and auditory tract, acoustics, and
neurology. Phonology relies on phonetic information for its practice, but focused
on the non verbal communication creating it meaning on how such patterens are
interpreted.
The Difference Between Phonetics And Phonology
Phonetics is about the physical aspect of sounds, it
studies the production and the perception of sounds, called phones. Phonetics has some subcategories, but if not specified, we usually mean "articulatory phonetics": that is, "the study of the production of speech sounds by
the articulatory and vocal tract by the speaker". Phonetic
transcriptions are done using the square brackets, [ ]
Phonology is about the abstract aspect of sounds and it
studies the phonemes (phonemic transcriptions adopt the slash / /
). Phonology is about establishing what the
phonemes are in a given language, i.e. those sounds that can bring a difference
in meaning between two words. A phoneme is a phonic segment with a meaning
value, for example in minimal pairs:
My advisor, Dennis Preston, used to
tell students that the ear hears phonetics, but the brain hears phonology. That
is, your ear is capable of processing whatever linguistic sounds are given to
it (assuming someone with normal hearing), but your language experience causes
your brain to filter out only those sound patterns that are important to your
language(s)
Generally, phonetics is the study of fine
grained details of those sounds, while phonology has traditionally dealt with
analysis of greater abstractions. For understandable reasons, the line between
the two disciplines is blurring, particularly as our modeling capabilities
become more sophisticated. Still, the distinction is useful.
BY
ADEGBITE.A.SHALLOM,
AND
ODETOLA FARUK