Linguolabial consonant

They represent one extreme of a coronal articulatory continuum which extends from linguolabial to subapical palatal places of articulation.

They are also relatively common in disordered speech, and the diacritic is specifically provided for in the extensions to the IPA.

[3] Linguolabials are produced by constricting the airflow between the tongue and the upper lip.

Linguolabials can be distinguished from bilabials and alveolars acoustically by formant transitions and nasal resonances.

While labials have become linguolabial before nonrounded vowels in various languages (e.g. Tangoa, Araki, Nese), the sound shift went further in languages such as Tolomako, which shifted the linguolabials to full alveolar consonants: *b > *[p] > p̈ [t̼] > t [t]; *m > m̈ [n̼] > n [n].