Phonetics
Linguistic sounds are produced by pushing air from the lungs out through the mouth, sometimes by way of the nasal cavity. The movement of the air can then be manipulated by the anatomy of the mouth and throat to produce different sounds. In actual writing, the same sound may often be spelt different ways.
For instance, George Bernard Shaw once pointed out that the word fish could as easily be spelt ghoti,
since gh has the same sound in enough, o has the same sound in women, and ti has the same sound in
nation. This makes sounds very hard to study without a more precise indication of what sounds we are referring to. The solution is to adopt a phonetic alphabet which always has the same spelling for the same sound. Linguists use phonetic alphabet called the International Phonetic Alphabet (IPA). In the IPA, the word fish would be spelt [fˆß].
Many IPA letters are the same as those of the English alphabet, so we place IPA spellings in square brackets to indicate that they are phonetic spellings. Note that many dictionaries give phonetic spellings as pronunciation guides, but not all dictionaries use the IPA. Likewise, the system of Phonics does not use the IPA. When looking at phonetic spellings, make sure you know what system you are using. Note also that linguists in the United States do not always follow the accepted international standard. For instance, most linguists in the United States would transcribe fish as [fˆš]. The individual differences will be described under the section on Phonology below.
Consonants
Consonants are produced by restricting and then releasing the flow of air in three ways: vibrating the
vocal cords, changing the part of the anatomy which restricts the air flow, and changing the extent to
which the air flow is restricted. Consonants with relatively little vibration of the vocal cords are called
voiceless consonants. Consonants with relatively more vibration of the vocal cords are called voiced.
Consonants fall into the following categories, depending on what part of the anatomy is used to restrict the air flow:
- Labial Air flow is restricted with the lips.
- Dental Air flow is restricted with the teeth.
- Labiodental Air flow is restricted with the top teeth on the bottom lip (if both lips are used the sound
- is called bilabial).
- Alveolar Air flow is restricted by placing the tongue on the hard plate (alveolum) behind the top
- front teeth.
- Palatal Air flow is restricted by placing the tongue on the soft palate behind the alveolum.
- Velar Air flow is restricted by placing the tongue far back in the mouth.
- Glottal Air flow is restricted by tightening the folds in the vocal cords (glottis).
Consonants can also be categorised by the extent to which the air flow is restricted:
- Stop Air flow is stopped and released quickly.
- Fricative Air flow is released gradually.
- Affricate Air flow is stopped and released gradually.
- Nasal Air flow is channeled through the nasal cavity.
- Liquid Air flow is channeled around the sides of the tongue.
- Glide Air flow is only partially restricted (these sounds are often called semi-vowels). Some languages have other categories, but only the ones above are the only ones that occur in English.
- Individual consonants can be made up of nearly any combination of the features above. For instance, [b] is a voiced labial stop and /s/ is a voiceless alveolar fricative.
Vowels
Vowels are produced by directing the flow of air into different parts of the mouth. They can be adjusted by changing the position of the tongue, by rounding of the lips, and by the degree of opening of the mouth. All vowels are voiced.The position of the tongue can be described in terms of how far forward the tongue is and how high it is. Vowels are categorised as follows, depending on the position of the tongue:
- Front The tongue is in the front of the mouth.
- Central The tongue is further back in the mouth.
- Back The tongue is in the back of the mouth.
- High The tongue is high in the mouth.
- Mid The tongue is lower in the mouth
- Low The tongue is low in the mouth.
All vowels can be described in terms of their location on both vertical and horizontal axes. A look at the Spanish vowel system demonstrates this. Examine the underlined vowels and the descriptions of them below:
Niño “boy” High Front Vowel Burro “donkey” High Back Vowel
Jose Mid Front Vowel Jose Mid Back Vowel
Mar “sea” Low Central Vowel
If you pronounce the High and Mid Back Vowels, you will find that you round your lips. These are called
rounded vowels.
The English vowel system is more complicated than the Spanish one. In English we create extra vowels
by opening the mouth more or less. When the mouth is relatively more open, the vowel is called lax.
When the mouth is relatively more closed, the vowel is tense. Compare the following English words:
Machine Tense High Front Vowel Salute Tense High Back Vowel
Chin Lax High Front Vowel Pull Lax High Back Vowel
Ballet Tense Mid Front Vowel Foal Tense Mid Back Vowel
Get Lax Mid Front Vowel For Lax Mid Back Vowel
Phonology
Consider the sound of the consonant in the English word the. This sound is a voiced dental fricative. In French, this sound does not exist, which is why English spoken with a French accent is famous for
replacing it with a voiced alveolar fricative z, which is very similar. The reason for this is that the number of linguistic sounds which humans can produce is greater than the number which actually occurs in each language. When studying an individual language, like English, we can therefore focus in only the sound that occur in that language and the system by which they relate to each other. Studying a system of sounds is called phonology.
When looking at the phonological system of an individual language, we limit our study to those sounds which are perceived by speakers as distinct and capable of indicating some grammatical significance. Sounds which meet these criteria are called phonemes. For instance, the [l] and [r] are perceived as distinct and help us understand the difference between lice and rice. However, [l] and [r] are not distinct phonemes in many Asian languages, which is why speakers of those languages often have trouble distinguishing the two words when speaking English. Linguists use the IPA to represent phonemes but
indicate that they are phonemes by placing them between slashes. Thus the word fish is rendered /fˆß/ (US /fˆš/). This is called phonemic transcription, as opposed to the phonetic transcription described above. In general, it is only necessary to use phonemic transcription when studying the English language.
Phonemic transcriptions represent the pronunciation of a word and the precise number of phonemes in the word. Thus the word fish has three phonemes, which can be seen clearly in the transcription /fˆß/ (US /fˆš/). The following is a list of phonemes in US English..."
See the chart and read more @ CSUN (dot) edu