Utente:Toadino2/Monovibrante alveolare in inglese

Il flapping o tapping (traducibile approssimativamente in italiano con monovibrantizzazione) è un processo fonologico, riscontrabile in molte varietà della lingua inglese, in particolare in Nord America, Australia e Nuova Zelanda, per cui le occlusive /t/ e /d/ passano ad una monovibrante alveolare in alcune posizioni, soprattutto in quella intervocalica. Alcuni parlanti avvertono questo con una sonorizzazione di /d/, così da percepire butter come se fosse budder. In effetti, entrambi i suoni vengono modificati in tale flap - un suono prodotto bloccando brevemente con la lingua il canale alveolare. In posizioni simili il nesso /nt/ può produrre una monovibrante nasalizzata, od addirittura farla cadere, così da rendere quasi omofoni winter e winner.

Terminology

The terms flap and tap are often used synonymously, although some authors make a distinction between them. According to Heinz Giegerich, a flap involves a rapid movement of the tongue tip from a retracted vertical position to a (more or less) horizontal position, during which the tongue tip brushes the alveolar ridge, while a tap involves a rapid upward and downward movement of the tongue tip, the upward movement being voluntary and the lowering involuntary. On this view, the sound referred to here is the alveolar tap, rather than the flap, even though the term "flapping" is ingrained in much of the phonological literature.

Even though taps and flaps are sometimes distinguished phonetically, no languages are known to contrast them, and they are assigned only one set of symbols in the International Phonetic Alphabet (IPA). The symbol for the alveolar tap (flap) discussed here is ɾ.

Distribution

Flapping/tapping may occur when /t/ or /d/ occurs between two vowels, as in butter, writing, wedding, loader. However it does not occur in most dialects when the /t/ or /d/ immediately precedes a stressed vowel, as in attack [əˈtʰæk], but they can tap in this environment when it spans a word boundary, as in got over [ɡɑɾˈoʊvɚ], and when a word boundary is embedded within a word, as in buttinsky [bʌɾˈɪnski]. Australian English also taps word-internally before a stressed vowel in words like fourteen.

The cluster /nt/ can also be tapped, being pronounced with a nasalized tap (IPA symbol ɾ̃). In quick speech this may become simply [n], so that words like winner and winter can become homophonous. Tapping does not occur for most speakers in words like carpenter and ninety, which instead surface with [d].

It is also reported that tapping may occur after r, as in barterdoes this apply only to non-rhotic accents?, and sometimes after l, as in faculty (but not immediately after the stress: alter → [ɔːɫtəɹ], not [*ɔːɫɾəɹ]).

Homophony

Flapping/tapping is a specific type of lenition, specifically intervocalic weakening. It leads to the neutralization of the distinction between /t/ and /d/ in appropriate environments; a partial merger of the two phonemes. For speakers with the merger these following utterances sound the same or almost the same (click "show" to display the table):

Homophonous pairs

/-t-, -nt-/ /-d-, -n-/ IPA Notes at 'em Adam ˈæɾəm at 'em add 'em ˈæɾəm atom Adam ˈæɾəm atom add 'em ˈæɾəm banter banner ˈbæɾ̃əɹ batter badder ˈbæɾəɹ beating beading ˈbiːɾɪ̈ŋ betting bedding ˈbɛɾɪ̈ŋ bitter bidder ˈbɪɾəɹ boating boding ˈboʊɾɪ̈ŋ, ˈboːɾɪ̈ŋ butting budding ˈbʌɾɪ̈ŋ catty caddy ˈkæɾi center sinner ˈsɪɾ̃əɹ With pen–pin merger. cited sided ˈsaɪɾɪ̈d coating coding ˈkoʊɾɪ̈ŋ, ˈkoːɾɪ̈ŋ cuttle cuddle ˈkʌɾəɫ cutty cuddy ˈkʌɾi debtor deader ˈdɛɾəɹ don't it doughnut ˈdoʊɾ̃ət With weak-vowel merger and toe-tow merger. futile feudal ˈfjuːɾəɫ, ˈfɪuɾəɫ With weak-vowel merger before /ɫ/. greater grader ˈɡɹeɪɾəɹ, ˈɡɹeːɾəɹ hearty hardy ˈhɑɹɾi heated heeded ˈhiːɾɪ̈d With meet-meat merger. hurting herding ˈhɜɹɾɪ̈ŋ With fern-fir-fur merger. inter- inner ˈɪɾ̃əɹ jointing joining ˈdʒɔɪɾ̃ɪ̈ŋ kitty kiddie ˈkɪɾi knotted nodded ˈnɒɾɪ̈d ladder latter ˈlæɾəɹ liter leader ˈliːɾəɹ With meet-meat merger. manta manna ˈmæɾ̃ə manta manner ˈmæɾ̃ə In non-rhotic accents. manta manor ˈmæɾ̃ə In non-rhotic accents. Marty Mardi ˈmɑɹɾi In the term Mardi Gras. matter madder ˈmæɾəɹ meant it minute ˈmɪɾ̃ɪ̈t With pen–pin merger. metal medal ˈmɛɾəɫ metal meddle ˈmɛɾəɫ mettle medal ˈmɛɾəɫ mettle meddle ˈmɛɾəɫ minty many ˈmɪɾ̃i With pen–pin merger. minty mini ˈmɪɾ̃i minty Minnie ˈmɪɾ̃i neater kneader ˈniːɾəɹ neuter nuder ˈnuːɾəɹ, ˈnjuːɾəɹ, ˈnɪuɾəɹ otter odder ˈɒɾəɹ painting paining ˈpeɪɾ̃ɪ̈ŋ parity parody ˈpæɹəɾi With weak-vowel merger patty paddy ˈpæɾi petal pedal ˈpɛɾəɫ petal peddle ˈpɛɾəɫ pettle pedal ˈpɛɾəɫ pettle peddle ˈpɛɾəɫ phantom fan 'em ˈfæɾ̃əm planter planner ˈplæɾ̃əɹ potted podded ˈpɒɾɪ̈d rated raided ˈɹeɪɾɪ̈d With pane-pain merger. rattle raddle ˈɹæɾəɫ righting riding ˈɹaɪɾɪ̈ŋ router ruder ˈɹuːɾəɹ With yod-dropping after /ɹ/. Saturday sadder day ˈsæɾəɹdeɪ satyr seder ˈseɪɾəɹ seating seeding ˈsiːɾɪ̈ŋ With meet-meat merger. sent it senate ˈsɛɾ̃ɪ̈t set it said it ˈsɛɾɪ̈t shutter shudder ˈʃʌɾəɹ sighted sided ˈsaɪɾɪ̈d sited sided ˈsaɪɾɪ̈d title tidal ˈtaɪɾəɫ traitor trader ˈtɹeɪɾəɹ With pane-pain merger. Tudor tutor ˈtuːɾəɹ, ˈtjuːɾəɹ, ˈtɪuɾəɹ waiter wader ˈweɪɾəɹ With pane-pain merger. wetting wedding ˈwɛɾɪ̈ŋ winter winner ˈwɪɾ̃əɹ whiter wider ˈwaɪɾəɹ With wine–whine merger. writing riding ˈɹaɪɾɪ̈ŋ

For most (but not all) speakers the merger does not occur when an intervocalic /t/ or /d/ is followed by a syllabic n, so written and ridden remain distinct. A non-negligible number of speakers (including pockets in the Boston area) lack the rule that glottalizes t and d before syllabic n, and therefore flap/tap /t/ and /d/ in this environment. Pairs like potent : impotent, with the former having a preglottalized unreleased t or a glottal stop (but not a flap/tap) and the latter having either an aspirated t or a flap/tap, suggest that the level of stress on the preceding vowel may play a role in the applicability of glottalization and flapping/tapping before syllabic n. Some speakers in the Pacific Northwest turn /t/ into a flap but not /d/, so writer and rider remain distinct even though the long i is pronounced the same in both words.

In accents characterized by Canadian raising, such words as riding and writing, both of which have an alveolar flap, continue to be distinguished by the preceding vowel: though the consonant distinction is neutralized, the underlying voice distinction continues to select the allophone of the /aɪ/ phoneme preceding it. Thus for many North Americans, riding is [ɹaɪɾɪŋ] while writing is [ɹɐɪɾɪŋ]. Vowel duration may also be different, with a longer vowel before tap realizations of /d/ than before tap realizations of /t/. At the phonetic level, the contrast between /t/ and /d/ may be maintained by these non-local cues, though as the cues are quite subtle, they may not be acquired/perceived by others. A merger of /t, d/ can then be said to have occurred in this context.

Other languages

A similar process also occurs in other languages, such as Western Apache (and other Southern Athabaskan languages). In Western Apache, intervocalic /t/ similarly is realized as [ɾ] in intervocalic position. This process occurs even over word boundaries. However, tapping is blocked when /t/ is the initial consonant of a stem (in other words tapping occurs only when /t/ is stem-internal or in a prefix). Unlike English, tapping is not affected by suprasegmentals (in other words stress or tone).

See also

• Phonological history of English consonants
• Regional accents of English

External links

• Recording of "a sentence about a center for dentists, at the frontal edge of the continent, by the Atlantic ocean", demonstrating flapping of /nt/