<P> Coarticulation in its general sense refers to a situation in which a conceptually isolated speech sound is influenced by, and becomes more like, a preceding or following speech sound . There are two types of coarticulation: anticipatory coarticulation, when a feature or characteristic of a speech sound is anticipated (assumed) during the production of a preceding speech sound; and carryover or perseverative coarticulation, when the effects of a sound are seen during the production of sound (s) that follow . Many models have been developed to account for coarticulation . They include the look - ahead, articulatory syllable, time - locked, window, coproduction and articulatory phonology models . </P> <Table> <Tr> <Th> Sound change and alternation </Th> </Tr> <Tr> <Td> Metathesis (show) <Ul> <Li> Quantitative metathesis </Li> </Ul> </Td> </Tr> <Tr> <Td> Lenition (show) <Ul> <Li> Consonant gradation </Li> <Li> Consonant voicing and devoicing </Li> <Li> Assibilation </Li> <Li> L - vocalization </Li> <Li> Debuccalization </Li> </Ul> </Td> </Tr> <Tr> <Td> Fortition </Td> </Tr> <Tr> <Td> Epenthesis (show) <Ul> <Li> Prothesis </Li> <Li> Paragoge </Li> <Li> Unpacking </Li> <Li> Vowel breaking </Li> </Ul> </Td> </Tr> <Tr> <Td> Elision (show) <Ul> <Li> Apheresis </Li> <Li> Syncope </Li> <Li> Apocope </Li> <Li> Haplology </Li> <Li> Cluster reduction </Li> </Ul> </Td> </Tr> <Tr> <Td> Transphonologization (show) <Ul> <Li> Compensatory lengthening </Li> <Li> Nasalization </Li> <Li> Tonogenesis </Li> <Li> Floating tone </Li> </Ul> </Td> </Tr> <Tr> <Td> Assimilation (show) <Ul> <Li> Fusion </Li> <Li> Coarticulation </Li> <Li> Palatalization </Li> <Li> Velarization </Li> <Li> Labialization </Li> <Li> Final devoicing </Li> <Li> Metaphony (vowel harmony, umlaut) </Li> <Li> Consonant harmony </Li> </Ul> </Td> </Tr> <Tr> <Td> Dissimilation </Td> </Tr> <Tr> <Td> Sandhi (show) <Ul> <Li> Liaison, linking R </Li> <Li> Consonant mutation </Li> <Li> Tone sandhi </Li> <Li> Hiatus </Li> </Ul> Synalepha <Ul> <Li> Elision </Li> <Li> Crasis </Li> <Li> Synaeresis and diaeresis </Li> <Li> Synizesis </Li> </Ul> </Td> </Tr> <Tr> <Td> Other types (show) <Ul> <Li> Gemination </Li> <Li> Clipping </Li> <Li> Fronting </Li> <Li> Raising </Li> <Li> Iotacism </Li> <Li> Lambdacism </Li> <Li> Relaxed pronunciation </Li> <Li> Rhotacism </Li> <Li> Rhinoglottophilia </Li> <Li> Sulcalization </Li> <Li> Shm - reduplication </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

Coarticulation refers to the fact that in producing speech
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