, a plosive, also known as an occlusive
or simply a stop, is a pulmonic consonant
in which the vocal tract is blocked
so that all airflow
The occlusion may be made with the tongue tip or blade (, ), tongue body (, ), lips (, ), or glottis (). Plosives contrast with nasals
, where the vocal tract is blocked but airflow continues through the nose, as in and , and with fricatives
, where partial occlusion impedes but does not block airflow in the vocal tract.
The terms ''stop, occlusive,'' and ''plosive'' are often used interchangeably. Linguists who distinguish them may not agree on the distinction being made. The terms refer to different features of the consonant. "Stop" refers to the airflow that is stopped. "Occlusive" refers to the articulation, which occludes (blocks) the vocal tract. "Plosive" refers to the release burst (plosion) of the consonant. Some object to the use of "plosive" for inaudibly released stops
, which may then instead be called "applosives". The International Phonetic Association
and the International Clinical Phonetics and Linguistics Association
use the term "plosive".
Either "occlusive" or "stop" may be used as a general term covering the other together with nasals. That is, 'occlusive' may be defined as oral
occlusive (plosives and affricate
s) plus nasal occlusives (nasals such as , ), or 'stop' may be defined as oral stops (plosives) plus nasal stops (nasals). Ladefoged
(1996) prefer to restrict 'stop' to oral non-affricated occlusives. They say,
:''what we call simply nasals are called nasal stops by some linguists. We avoid this phrase, preferring to reserve the term 'stop' for sounds in which there is a complete interruption of airflow.''
In addition, they restrict "plosive" for a pulmonic consonant
s; "stops" in their usage include ejective
If a term such as "plosive" is used for oral non-affricated obstruents, and nasals are not called nasal stops, then a ''stop'' may mean the glottal stop
; "plosive" may even mean non-glottal stop. In other cases, however, it may be the word "plosive" that is restricted to the glottal stop. Note that, generally speaking, plosives do not have plosion (a release burst). In English, for example, there are plosives with no audible release
, such as the in ''apt''. However, English plosives do have plosion in other environments.
In Ancient Greek
, the term for plosive was (''áphōnon''), which means "unpronounceable", "voiceless", or "silent", because plosives could not be pronounced without a vowel. This term was calque
d into Latin
as , and from there borrowed into English as ''mute''. ''Mute'' was sometimes used instead for voiceless consonants, whether plosives or fricatives, a usage that was later replaced with ''surd'', from Latin "deaf" or "silent", a term still occasionally seen in the literature. For more information on the Ancient Greek terms, see .
A plosive is typically analysed as having up to three phases:
*Approach, during which articulators come together
*Hold (or "occlusion" or "closure"), during which the articulators are held and block the airstream
*Release (or "burst" or "plosion"), when the articulators are separated, releasing the compressed air
Only the hold phase is requisite. A plosive may lack an approach when it is preceded by a consonant that involves an occlusion at the same place of articulation, as in in ''end'' or ''old''. In many languages, such as Malay
, word-final plosives lack a release burst, even when followed by a vowel, or have a nasal release
. See no audible release
Nasal occlusives are somewhat similar. In the catch and hold, airflow continues through the nose; in the release, there is no burst, and final nasals are typically unreleased across most languages.
, the catch and hold are those of a plosive, but the release is that of a fricative
. That is, affricates are plosive–fricative contour
All spoken natural languages in the world have plosives, and most have at least the voiceless plosives , , and . However, there are exceptions: Colloquial Samoan
lacks the coronal
, and several North American languages, such as the northern Iroquoian
and southern Iroquoian
languages (i.e., Cherokee
), lack the labial
. In fact, the labial is the least stable of the voiceless plosives in the languages of the world, as the unconditioned sound change → (→ → Ø) is quite common in unrelated languages, having occurred in the history of Classical Japanese
, Classical Arabic
, and Proto-Celtic
, for instance. Formal Samoan
has only one word with velar
; colloquial Samoan conflates and to . Ni‘ihau Hawaiian
has for to a greater extent than Standard Hawaiian, but neither distinguish a from a . It may be more accurate to say that Hawaiian and colloquial Samoan do not distinguish velar and coronal plosives than to say they lack one or the other.
See Common occlusives
for the distribution of both plosives and nasals.
plosives are pronounced with vibration of the vocal cords
plosives without. Plosives are commonly voiceless, and many languages, such as Mandarin Chinese
, have only voiceless plosives. Others, such as most Australian languages
, are indeterminate: plosives may vary between voiced and voiceless without distinction.
plosives, the vocal cords
(vocal folds) are abducted at the time of release. In a prevocalic aspirated plosive (a plosive followed by a vowel or sonorant), the time when the vocal cords begin to vibrate will be delayed until the vocal folds come together enough for voicing to begin, and will usually start with breathy voicing. The duration between the release of the plosive and the voice onset is called the ''voice onset time
'' (VOT) or the ''aspiration interval''. Highly aspirated plosives have a long period of aspiration, so that there is a long period of voiceless airflow (a phonetic ) before the onset of the vowel. In tenuis
plosives, the vocal cords come together for voicing immediately following the release, and there is little or no aspiration (a voice onset time close to zero). In English, there may be a brief segment of breathy voice that identifies the plosive as voiceless and not voiced. In voiced plosives, the vocal folds are set for voice before the release, and often vibrate during the entire hold, and in English, the voicing after release is not breathy. A plosive is called "fully voiced" if it is voiced during the entire occlusion. In English, however, initial voiced plosives like or may have no voicing during the period of occlusion, or the voicing may start shortly before the release and continue after release, and word-final plosives tend to be fully devoiced: In most dialects of English, the final /b/, /d/ and /g/ in words like ''rib'', ''mad'' and ''dog'' are fully devoiced.
Initial voiceless plosives, like the ''p'' in ''pie'', are aspirated, with a palpable puff of air upon release, whereas a plosive after an ''s'', as in ''spy'', is tenuis
(unaspirated). When spoken near a candle flame, the flame will flicker more after the words ''par, tar,'' and ''car'' are articulated, compared with ''spar, star,'' and ''scar''. In the common pronunciation of ''papa'', the initial ''p'' is aspirated whereas the medial ''p'' is not.
In a geminate
or long consonant, the occlusion lasts longer than in simple consonants. In languages where plosives are only distinguished by length (e.g., Arabic, Ilwana, Icelandic), the long plosives may be held up to three times as long as the short plosives. Italian
is well known for its geminate plosives, as the double ''t'' in the name ''Vittoria'' takes just as long to say as the ''ct'' does in English ''Victoria''. Japanese
also prominently features geminate consonants, such as in the minimal pair 来た ''kita'' 'came' and 切った ''kitta'' 'cut'.
Note that there are many languages where the features voice, aspiration, and length reinforce each other, and in such cases it may be hard to determine which of these features predominates. In such cases, the terms fortis
is sometimes used for aspiration or gemination, whereas lenis
is used for single, tenuous, or voiced plosives. Be aware, however, that the terms ''fortis'' and ''lenis'' are poorly defined, and their meanings vary from source to source.
are differentiated from plosives only by a lowered velum
that allows the air to escape through the nose during the occlusion. Nasals are acoustically sonorant
s, as they have a non-turbulent airflow and are nearly always voiced, but they are articulatorily obstruent
s, as there is complete blockage of the oral cavity. The term occlusive
may be used as a cover term for both nasals and plosives.
A prenasalized stop
starts out with a lowered velum that raises during the occlusion. The closest examples in English are consonant clusters such as the d
in ''candy'', but many languages have prenasalized stops that function phonologically as single consonants. Swahili
is well known for having words beginning with prenasalized stops, as in ''ndege'' 'bird', and in many languages of the South Pacific, such as Fijian
, these are even spelled with single letters: ''b'' b
A postnasalized plosive
begins with a raised velum that lowers during the occlusion. This causes an audible nasal ''release'', as in English ''sudden''. This could also be compared to the /dn/ cluster found in Russian
and other Slavic languages, which can be seen in the name of the Dnieper River
Note that the terms ''prenasalization'' and ''postnasalization'' are normally used only in languages where these sounds are phonemic: that is, not analyzed into sequences of plosive plus nasal.
Stops may be made with more than one airstream mechanism
. The normal mechanism is pulmonic egressive
, that is, with air flowing outward from the lungs. All languages have pulmonic stops. Some languages have stops made with other mechanisms as well: ejective stops
), implosive stops
), or click consonant
s (lingual ingressive
plosive is produced with more muscular tension than a lenis
plosive. However, this is difficult to measure, and there is usually debate over the actual mechanism of alleged fortis or lenis consonants.
There are a series of plosives in the Korean language
, sometimes written with the IPA symbol for ejectives, which are produced using "stiff voice
", meaning there is increased contraction of the glottis than for normal production of voiceless plosives. The indirect evidence for stiff voice is in the following vowels, which have a higher fundamental frequency than those following other plosives. The higher frequency is explained as a result of the glottis being tense. Other such phonation
types include breathy voice
, or murmur; slack voice
; and creaky voice
The following plosives have been given dedicated symbols in the IPA
Many subclassifications of plosives are transcribed by adding a diacritic
or modifier letter
to the IPA symbols above.
(the opposite of an stop)
* List of phonetics topics
* Pop filter
* Nonexplosive stop
*Ian Maddieson, ''Patterns of Sounds'', Cambridge University Press
* Bibliotheca Phonetica, Karger, Basel, 1968
Category:Manner of articulation