Voiced upper-pharyngeal plosive
A voiced upper-pharyngeal plosive or stop is a rare consonant.
According to laryngoscopic studies, pharyngeal and epiglottal consonants are both pronounced in the pharynx, being separated into the upper and lower regions, respectively. This has led some phoneticians such as John Esling to propose the merging of epiglottal consonants into the pharyngeal column in the International Phonetic Alphabet chart. If the distinction is maintained between pharyngeal and epiglottal consonants in place of articulation due to their position within the pharynx, then remains a lower-pharyngeal plosive, while the pair and are provided by the extIPA for voiceless and voiced upper-pharyngeal plosives, respectively.
No language is known to have a phonemic upper pharyngeal plosive. The Nǁng language is claimed to have an upper pharyngeal place of articulation among its click consonants. Clicks in Nǁng have a rear closure that is said to vary between uvular to upper pharyngeal, depending on the click type. However, if the place were truly pharyngeal, these articulations could not occur as nasal clicks, which they do.
Otherwise, upper pharyngeal plosives are only known from disordered speech. The extIPA provides the letter, equivalent to IPA, to transcribe such a sound.