Manners of Articulation


The lips, tongue, velum and glottis can be positioned in different ways to produce different sound types.

These various configurations are called the manners of articulation.

Oral Vs Nasal Phones

A basic distinction in manners of articulation is between oral and nasal phones.

When the velum is raised, cutting off the airflow through the nasal passage, oral sounds are produced.

Nasal sounds are produced when the velum is lowered to allow the passage of air through the nasal passage.

Both consonants and vowels can be nasal – in which case the phones are generally voiced.

Obstruents & Sonorants

In phonetics, an obstruent is a consonant sound formed by obstructing the airway.

Obstruents are subdivided into:


In phonetics and phonology, a sonorant is a member of a class of speech sounds that are continuants produced without turbulent airflow in the vocal tract:

nasal consonants

Stops & Plosives

Stops and plosives are made with a complete and momentary closure of airflow through the vocal tract, thus preventing the escape of air.

Usually, the term plosive is reserved for oral (non-nasal) stops: i.e. stops with a release burst.

In the world’s languages, stops are found at the following points of articulation:


Classification of Stops

Stops may further be classified depending on the following properties:
airstream mechanism

Nasal stops are differentiated from oral stops by the lowered velum that allows air to escape through the nose during articulation

Acoustically nasal stops are sonorants, as they have a non-turbulent airflow and are nearly always voiced

but in terms of articulation, they are obstruents, as there is a complete blockage of the oral cavity

Nasal Stops in English
Although nasal stops may occur at most places of articulation, English has only a few

While nasal stops may be either voiced or voiceless, they are typically voiced in most human languages

Bilabial nasal stops – [m] entail complete closure between the lips, voicing and escape of air through the nasal cavity

e.g. [m] in map

Labio-dental nasal stops – entail complete closure between the lower lip and upper teeth, voicing and escape of air through the nasal cavity

e.g. labiodental nasal stop in pamphlet – pamphlet ( or pamphlet

In English labio-dental nasal stops occur before labio-dental sounds and is a reflection of the process called assimilation (which we will talk about in a later session)

Dental nasal stops – entail complete closure between the tip of the tongue and the upper teeth, voicing and escape of air through the nasal cavity

e.g. dental nasal stop in tenth – tenth

Alveolar nasal stops – [n] entail complete closure between the blade of the tongue and the alveolar ridge, voicing and escape of air through the nasal cavity

e.g. [n] in not – not

Velar nasal stops – entail complete closure between the back of the tongue and the velum, voicing and escape of air through the nasal cavity

e.g. velar nasal stop in sing – sing

Voiced stops are articulated with vibrations of the vocal cords

Voiceless stops are articulated without vibration of the vocal cords.

In English, plosives are usually voiceless, whereas nasal stops are mostly voiced

Aspirated sounds are those where the vocal cords begin to vibrate later than the release of the stop

A stronger puff of air is felt on articulation of an aspirated stop
e.g. [p] in pit

Aspirated stops are transcribed with an aspiration diacritic – diacritic for aspiration
e.g. in aspirated P pit pit

Some languages differentiate between ‘normal’ stops and long stops – geminates (which may last up to three times as long as the short stops

However, English does not mark such a distinction in stops (or any other consonants)

Airstream mechanism

Stops may be made with more than one airstream mechanism. The normal airstream mechanism for producing stops is pulmonic egressive, that is, with air flowing outward from the lungs.

However, it is possible to make stops with more than one airstream mechanism

All languages have pulmonic stops

Some languages have stops made with other mechanisms as well:

– ejective stops (glottalic egressive)
– implosive stops (glottalic ingressive)
– lick consonants (velaric ingressive)
Tenseness is a mark of the degree of muscular constriction of the glottis.

Although English does mark a distinction between tenseness and laxness in vowels, consonants are not differentiated on this basis.

Plosives & Stops in English

The Plosives and stops in English are:

i. voiceless bilabial plosive – [p]
ii. voiced bilabial plosive – [b]
iii. voiceless alveolar plosive – [ t]
iv. voiced alveolar plosive – [d]
v. voiceless velar plosive – [k]
vi. voiced velar plosive – [g]
vii. glottal stop – glottal stop(not marked as a phoneme in most dialects of English)
viii. bilabial nasal stop – [m]
ix. alveolar nasal stop – [n]
x. velar nasal stop – velar nasal stop

Although the following distinctions may be used in speech, English does not mark them as distinctive phonemes.
– labio-dental nasal stop – labiodental nasal stop
– dental nasal stops – dental nasal stop

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