语言学资料 phonetics and phonology.doc

Chapter 2 Phonetics and Phonologyu Teaching Objectives To know the difference between phonetics and phonology To have some ideas about the classification of English consonants and vowels To understand some important concepts in phonology u Time Arrangement Altogether 3 periods.2.1 The Phonic Medium of LanguageSpeech and writing are the two media used by natural languages as vehicles for communication. Of the two media of language, speech is more basis than writing. Language is primarily spoken. The writing system of any language is always “invented” by its users to record speech when there are needs. Language is first perceived through its sounds. Thus the study of sounds is of great importance in linguistics. Naturally, linguists are not interested in all sounds that humans are capable of producing; they are concerned with those sounds that are produced by humans through their speech organs and have a role to play in linguistic communication. These sounds are not only limited in number, but also universal to some extent. The limited range of sounds which are meaningful in human communication constitute the phonic medium of language, and the individual sounds within this range are the speech sounds. 2.2 Phonetics 2.2.1 Definition and Scope u Phonetics is the scientific study of the phonic medium of language and is concerned with defining and classifying speech sounds u Generally, the study of phonetics is composed of the 3 separate branches: articulatory phonetics, acoustic phonetics, and auditory phonetics.- aritculatory phonetics: study the sounds from the speakers point of view, i.e., how a speaker uses his speech organs to produce the sounds. It also deals with the identification and classification of individual sounds. - acoustic phonetics: focus on the analysis and measurement of sound waves, the physical means by which sounds are transmitted through the air from one person to another. - auditory phonetics: study the sounds from the hearers point of view, i.e., how the sounds are perceived (感知) by the hearer. u The 3 branches are closely related to each other. Speech sounds cannot be divorced from the organs that articulate them and a sound wave does not exist in isolation from the source that generates it. All the approaches are indispensable to an understanding of phonetics. u In this part well focus on articulatory phonetics and at the same time make some reference to the acoustic properties of sounds when necessary. 2.2.2 Vocal Organs / Articulatory Apparatus (p.16)The articulatory apparatus of a human being are contained in 3 important areas: the pharyngeal cavity the throat, the oral cavity the mouth, and the nasal cavity the nose. The air stream coming from the lungs may be modified in the larynx, and in these cavities in various ways. Such modification results from kind of interference with the movement of the air stream. The pharyngeal cavity- when vocal cords are relaxed and folded back at each side to let air flow through freely and silently without causing vibration, the sounds produced in such a condition are voiceless. - when vocal cords are held together tightly so that the air stream vibrates them at different speeds while forcing its passage through them, the vibration of the vocal cords results in a quality of speech sounds called voicing, which is a feature of all vowels and some consonants in English. The oral cavity - the greatest source of modification of the air stream is found here. - of all the speech organs in this cavity, the tongue is the most flexible and is responsible for more varieties of articulation. k g j t d - apart from the tongue and the roof of the mouth, obstruction can be created between the upper teeth and the lower lip and between the lips f v p b The nasal cavity- when the passage of air to the mouth is closed so that air is allowed to exit through the nose, the sounds pronounce are nasalized. m n 2.2.3 Transcription of Sounds （p.17） With the need for a standardized and internationally accepted system of phonetic transcription, the International Phonetic Alphabet (IPA) came into being in 1888, whose basic principle is using one letter selected from major European languages to represent speech in the form of segments, or individual speech sounds. As some speech sounds produced differ only in some detailed aspects, the IPA provides its users with another set of symbols called diacritics, which are added to the letter-symbols to bring out the finer distinctions than the letters alone may possibly do. Thus there are two ways to transcribe speech sounds: broad transcription - the transcription with letter-symbols only and narrow transcription - the transcription with letter-symbols together with the diacritics. Broad transcription is the transcription normally used in dictionaries and teaching textbooks for general purposes. Narrow transcription is the transcription needed and used by the phoneticians in their study of speech sounds. Example 1:l in the four words leaf li:f, feel fi:l, build bild, health hel and play plei differ l in li:f, occurring before a vowel, - a clear l清晰音, no diacritic is needed l in fi:l and bild, occurring at the end of a word or before another consonant, - a dark l模糊音 - in narrow transcription the diacritic is usedl in hel, followed by the dental sound and affected by it, - a dental l - in narrow transcription the diacritic is usedl in plei, following a voiceless plosive (p), - a devoiced l 清音化 - in narrow transcription the diacritic 0 is used. Example 2:p in pit and spitp in pit, pronounced with a strong puff of air - aspirated p - phit p in spit, pronounced with a withheld puff of air- unaspirated p - spit Example 3:play broad plei narrow aspiration, devoicing tenth broad ten narrow aspiration, nasalization, dentalization 2.2.4 Classification of English sounds English Consonants (24 / 28) p.18An initial classification will divide the speech sounds into two broad categories: vowels and consonants,In the pronunciation of consonants the air that comes from the lungs meets with obstruction in one way or another. Traditional linguists think there are altogether 28 consonants. But modern linguistics believe that there are 24 consonants, not including /tr/, /dr/, /ts/, /dz/ because they are not considered as independent sounds, but the consonant clusters. Consonants are usually classified according to their place of articulation and manner of articulation. - in terms of manner of articulation: 6 stops / plosives; 9 fricatives; 2 affricates; 2 liquids (a lateral & a retroflex) 3 nasals; 2 glides / semivowels; (trills in some regional accents）- in terms of place of articulation: 4 bilabials; 2 labiodentals; 2 dental sounds; 7 alveolar sounds; 5 palatal sounds; 3 velar sounds; 1 glottal English Vowels (20/25) p.20As in the production of vowels the air stream meets with no obstruction, they cannot be classified in terms of manner of articulation or place of articulation as consonants. Other criteria have to be found for their classification. 1) Openness of the mouth (close, semi-close, semi-open, open) 2) Position of the highest part of the tongue (front, central, back)3) Degree of lip rounding/shape of lips (rounded, unrounded)4) Length of the vowel (long, short)5) Pure or gliding (monophthong, diphthong, triphthong) Diphthongs A vowel sound that glides from one quality to another: 8 Triphthongs - a vowel sound that glides successively through three qualities: 52.3 Phonology 2.3.1 Phonology and Phonetics Similarity: research objects - the speech sounds Difference: research approaches and focusesPhonetics general study of all the speech sounds used in all human languages about how they are produced, how they differ from each other, what phonetic features they possess, how they can be classified, etc.Phonology about how speech sounds in a language form patterns and how they are used to convey meaning in linguistic communication. 2.3.2 Phone, Phoneme, and allophone u Phone and phonemeA phone is A phoneme is A phonetic unit, concrete A phonological unit, abstract One of many possible sounds Not any particular sound, but represented orheard or produced in languages realized as a certain phone The smallest identifiable unit The smallest contrastive unit distinguishingfound in a stream of speech, not between meanings of words in the soundnecessarily distinguish meaning system of a particular language.Pronounced in a defined way. Pronounced in one or more ways,depending on the number of allophones.Represented between brackets Represented between slashes by convention. E.g. b, j, o by convention. E.g. /b/, /j/, /o/u Allophones - different phones that can represent a phoneme in different phonetic environment.- variants of a phoneme which do not change the meaning with substitution - For example, /p/ phi: k & spi:k /t/ thi: k & sti:k /l/ li:k & fi:l & hel & milk- Distinctive features (p.24):the features that a phoneme possesses, making it different from other phonemes; shown in the form of a binary opposition, only one of two values + or -; e.g.: /p/ -syllabic +consonantal sonorant +anterior coronal -voiced nasal 构成音节的 响音 前面的 舌尖音的 /i:/ +syllabic consonantal +sonorant +high back round +continuant 响音： all vowels + consonants /l/, /m/, /n/, / /, /r/, /w/, /j/2.3.3 Phonemic contrast, complementary distribution and minimal pair (p.24) Phonemic contrast - formed by two distinctive phonemes Complementary distribution - Allophones of the same phoneme do not distinguish meaning, but complement each other in distribution. That is, they occur in different phonetic environments and they are said to be in complementary distribution. Minimal pair - a basic way to determine the phonemes of a language is to see if substituting one sound for another results in a change of meaning. If it does, the two sounds then represent different phonemes. - an easy way to do this is to find the minimal pairs: 2 different forms are identical in every way except for one sound segment which occurs in the same place in the strings the 2 sound combinations forming a minimal pair the 2 sounds representing different phonemes. more than 2 sound combinations constituting a minimal set together. - This way applies both to the consonants and vowels- E.g.: pill & bill, bill & kill, kill & till, till & pill minimal pairs pill, bill, kill, till a minimal set (identical in form except for the initial consonant) /p/, /b/, /k/, /t/ phonemes beat, bet, boot, but, bait, bite, boat a minimal set (identical except for the vowel) /i:/, /e/, /u:/, /, /ei/, /ai/, /eu/ phonemes 2.3.4 Phonological rules (p.25) Sequential rules l The phonemes of a language cannot not strung together in any random order to form words. The phonological system determines which phonemes can begin a word, end a word, and follow each other. e.g.: /b/ , /l/, /i/, /k/ p.25l If a word begins with a l or a r, the next sound must be a vowel.l If three consonants should cluster together at the beginning of a word, the combination should obey the following 3 rules; (1) The first phoneme must be /s/(2) The second phoneme must be /p/ or /t/ or /k/(3) The third phoneme must be /l/ or /r/ or /w/e.g.: spring /spri/, strict /strict/, square/skew/, splendid /splendid/, scream /skri:m/ l Every word must contain at least one vowel-like segment. l The rules governing the phonological patterning are language specific. What is not permissible in English might be permissible in another language. Assimilation rule n When we speak, we tend to increase the ease of articulation. This “sloppy” tendency may become regularized as rules of language. The assimilation rule assimilates one sound to another by “copying” a feature of a sequential phoneme, thus making the two phones similar. l Nasalization of vowels in certain phonetic contexts.e.g.: i: bean, green, team, screaml The varying pronunciation of the alveolar nasal /n/ in some sound combination e.g.: alveolar nasal /n/ - still alveolar nasal in indiscreet (for /d/ is an alveolar stop) alveolar nasal /n/ - velar nasal / in incorrect ( for /k/ is a velar stop) l The sound assimilation is actually reflected in the spelling in most cases.Inpossible impossible, as the /n/ sound is assimilated to /m/Inplausibel implausible, inlegal illegal, inregular -. irregular Deletion rule n It tells when a sound is to be deleted although it is orthographically represented. e.g.: sign, design, paradigm no /g/ sound though it is represented in spelling by the letter gsignature, designation, paradigmatic /g/ represented by the letter g is pronounced l The rule is: delete a /g/ when it occurs before a final nasal consonant. 2.3.5 Suprasegmental FeaturesSegment - any linguistic unit in a sequence which may be isolated from the rest of the sequence, e.g. a sound in an utterance or a letter in a written text Suprasegmental (in phonetics and phonology) a unit which extends over more than one sound in an utterance., e.g. syllable, word, sentence. Stress l Stress is the pronunciation of a word or syllable with more force than the surrounding words or syllables. Briefly, stress is syllable prominence. l Stress in a syllable is achieved by changing the pitch, making the syllable louder, or making it longer. l In a word, the basic difference is between stressed and unstressed syllables. The syllable with the greatest prominence had the primary stress and the next stressed syllable the secondary stress. A word, if long enough, may have several nonprimary stresses. However, no word has more than one primary stress. l Stress has two main semantic functions: distinguishing between two words which are alike, e.g. import (n.) and import (v.); emphasizing the syllable or word, e.g. I said induce, not deduce. l There are two kinds of stress: word stress and sentence stress.l Word stress the location of stress distinguishes meaning. (1) a shift of stress may change the part of speech of a word form a noun to a verb. e.g.: increase (n.) increase (v.); insult (n.) insult (v.); rebel (n.) rebel (v.) (2) the alteration of stress occurs between a compound noun and a phrase consisting of the same elements e.g.: blackbird (compound) a particular kind of bird, which is not necessarily black. black bird (noun phrase) a bird whose color is black greenhouse green house; hotdog hot dog (3) the meaning-distinctive role played by word stress is also manifested in the ing + noun combinations. e.g.: dining room (compound) - -ing serving as a modifier of the noun readi