Voiceless nasal glottal approximant

The voiceless nasal glottal approximant is a type of consonantal sound, a nasal approximant, used in some oral languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨h̃⟩, that is, an h with a tilde.

Occurrence
The h sound is nasalized in several languages, apparently due to a connection between glottal and nasal sounds called rhinoglottophilia. Examples of languages where the only h-like sound is nasalized are Krim, Lisu, and Pirahã.

More rarely, a language will contrast oral and nasal. Two such languages are neighboring Bantu languages of Angola and Namibia, Kwangali and Mbukushu. In these languages, vowels following are nasalized, though nasal vowels do not occur elsewhere. A distinction is also reported from Wolaytta, though in that case the nasal is rare.