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The International Phonetic Alphabet (IPA) does not have separate symbols for the alveolar consonants. Rather, the same symbol is used for all coronal places of articulation which aren't palatalized like English palato-alveolar sh, or retroflex. To disambiguate, the bridge ([s̪, t̪, n̪, l̪], etc.) may be used for a dental consonant, or the under-bar ([s̠, t̠, n̠, l̠], etc.) may be used for the postalveolars. Note that [s̪] differs from dental [θ] in being a sibilant, rather than a thibilant. [s̠] differs from postalveolar [ʃ] in being unpalatalized.
The bare letters [s, t, n, l], etc. cannot be assumed to specifically represent alveolars. The language may not make such distinctions, such that two or more coronal places are found allophonically, or the transcription may simply be too broad to distinguish dental from alveolar. If it is necessary to specify a consonant as alveolar, a diacritic from the Extended IPA may be used: [s͇, t͇, n͇, l͇], etc.. Nonetheless, the symbols <s, t, n, l> themselves are frequently called 'alveolar', and the language examples below are all alveolar sounds.
(The Extended IPA diacritic was devised for speech pathology and is frequently used to mean 'alveolarized', as in the labioalveolar sounds [p͇, b͇, m͇, f͇, v͇], where the lower lip contacts the alveolar ridge.)
The alveolar/coronal consonants identified by the IPA are:
IPA Description Example
alveolar nasal
English
run
[ɹʷʌn]
run
voiceless alveolar plosive
English
tap
[tʰæp]
tap
voiced alveolar plosive
English
debt
[dɛt]
debt
voiceless alveolar fricative
English
suit
[sjuːt]
suit
voiced alveolar fricative
English
zoo
[zuː]
zoo
voiceless alveolar affricate
German
Zeit
[t͡saɪt]
time
voiced alveolar affricate
Italian
zaino
[ˈd͡zaino]
backpack
voiceless alveolar lateral fricative
Welsh
Llwyd
[ɬʊɪd]
the name Lloyd or Floyd
voiced alveolar lateral fricative
Zulu
dlala
[ˈɮálà]
to play
alveolar approximant
English
red
[ɹʷɛd]
red
alveolar lateral approximant
English
loop
[lup]
loop
alveolar flap
Spanish
pero
[peɾo]
but
alveolar lateral flap
Venda
[vuɺa]
to open
alveolar trill
Spanish
perro
[pero]
dog
alveolar ejective
Georgian
ტიტა
[tʼitʼa]
tulip
alveolar ejective fricative
Amharic
[sʼɛɡa]
grace
voiced alveolar implosive
Vietnamese
đã
[ɗɐː]
Past tense indicator
alveolar lateral click
Nama
ǁî
[kǁĩĩ]
discussed
The alveolar or dental consonants [t] and [n] are, along with [k], the most common consonants in human languages. Nonetheless, there are a few languages which lack them. A few languages on Bougainville Island and around Puget Sound, such as Makah, lack nasals and therefore [n], but have [t]. Colloquial Samoan, however, lacks both [t] and [n], though it has a lateral alveolar approximant [l]. (Samoan words written with the letters t and n are pronounced with [k] and [ŋ] except in formal speech.)
Japanese speakers often mix alveolar lateral approximant sounds in other languages with alveolar approximant sounds due to a lack of alveolar lateral approximants in their own language.[citation needed]