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Theoretical linguistics
From Wikipedia, the free encyclopedia
Theoretical linguistics is the branch of linguistics that is most concerned with developing models of linguistic knowledge. Part of this endeavor involves the search for and explanation of linguistic universals, that is, properties all languages have in common. The fields that are generally considered the core of theoretical linguistics are syntax, phonology, morphology, and semantics. Although phonetics often informs phonology, it is often excluded from the purview of theoretical linguistics, along with psycholinguistics and sociolinguistics.
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Phonetics is the study of speech sounds with concentration on three main points :
- Articulation : the production of speech sounds in human speech organs.
- Perception : the way human ears respond to speech signals, how the human brain analyses them.
- Acoustic features : physical characteristics of speech sounds such as color, loudness, amplitude, frequency etc.
According to this definition, phonetics can also be called linguistic analysis of human speech at the surface level. That is one obvious difference from phonology, which concerns the structure and organisation of speech sounds in natural languages, and furthermore has a theoretical and abstract nature. One example can be made to illustrate this distinction: In English, the suffix -s can represent either [s], [z] or can be silent (symbolised as ø) depending on context.
Orthographic representation : S, s Phonetic features: Phonetic representations: [s], [z], ø Perception through the ear: high frequency sounds accompanied by a hissing noise. Acoustic features: Frequency : 8000 - 11000 Hz Color : similar to the hissing noise made by snakes. Phonological characteristics : Occurrence : beginning, middle or end of words. Accompanied by vowels or consonants. Distinguishes meanings of words depending on context: s''low ≠ g''low
The field of articulatory phonetics is a subfield of phonetics. In studying articulation, phoneticians attempt to document how humans produce speech sounds (vowels and consonants). That is, articulatory phoneticians are interested in how the different structures of the vocal tract, called the articulators (tongue, lips, jaw, palate, teeth etc.), interact to create the specific sounds.
Auditory phonetics is a branch of phonetics concerned with the hearing, acquisition and comprehension of phonetic sounds of words of a language. As articulatory phonetics explores the methods of sound production, auditory phonetics explores the methods of reception--the ear to the brain, and those processes.
Acoustic phonetics is a subfield of phonetics which deals with acoustic aspects of speech sounds. Acoustic phonetics investigates properties like the mean squared amplitude of a waveform, its duration, its fundamental frequency, or other properties of its frequency spectrum, and the relationship of these properties to other branches of phonetics (e.g. articulatory or auditory phonetics), and to abstract linguistic concepts like phones, phrases, or utterances.
Phonology is the branch of theoretical linguistics concerned with speech sounds at a higher level than phonetics, i.e their structure and organisation in human languages. According to this definition, phonology is always preceded by phonetics, which provides materials for the subfield to analyse.
Morphology is the study of word structure. For example in the sentences The dog runs and The dogs run, the word forms runs and dogs have an affix -s added, distinguishing them from the bare forms dog and run. Adding this suffix to a nominal stem gives plural forms, adding it to verbal stems restricts the subject to third person singular. Some morphological theories operate with two distinct suffixes -s, called allomorphs of the morphemes Plural and Third person singular, respectively. Languages differ wrt. to their morphological structure. Along one axis, we may distinguish analytic languages, with few or no suffixes or other morphological processes from synthetic languages with many suffixes. Along another axis, we may distinguish agglutinative languages, where suffixes express one grammatical property each, and are added neatly one after another, from fusional languages, with non-concatenative morphological processes (infixation, Umlaut, Ablaut, etc.) and/or with less clear-cut suffix boundaries.
Syntax is the study of language structure and word order. It is concerned with the relationship between units at the level of morphology or words, depending upon whether you are studying syntax at MIT or Stanford. Syntax seeks to delineate exactly those sentences which make up a given language, using native speaker intuition. Syntax seeks to describe formally exactly how structural relations between elements (lexical items/words and operators) in a sentence contribute to its interpretation. Syntax uses principles of formal logic and Set Theory to formalize and represent accurately the hierarchical relationship between elements in a sentence. Abstract syntax trees are often used to illustrate the hierarchical structures that are posited. Thus, in active declarative sentences in English the subject is followed by the main verb which in turn is followed by the object (SVO). This order of elements is crucial to its correct interpretation and it is exactly this which syntacticians try to capture. They argue that there must be such a formal computational component contained within the language faculty of normal speakers of a language and seek to describe it.
Semantics is the study of intensive meaning in words and sentences.
Semantics can be expressed through diction (word choice) and inflexion. Inflexion may be conveyed through an author's tone in writing and a speaker's tone of voice, changing pitch and stress of words to influence meaning.