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Nasal clicks are click consonants pronounced with nasal airflow. All click types have nasal variants, and these are attested in four or five phonations: voiced, voiceless, aspirated, murmured , and—in the analysis of Miller —glottalized.
Modally voiced nasal clicks are ubiquitous: They are found in every language which has clicks as part of its regular sound inventory. This includes Damin, which has only nasal clicks, and Dahalo, which has only plain and glottalized nasal clicks. They are fully nasalized throughout, like the pulmonic nasal and. That is, you pronounce a uvular sound with the back of your tongue, and make the click sound in the middle of it using the front of your tongue. They are typically transcribed something like ⟨ᵑǃ⟩; in Khoekhoe, they are written ⟨ǃn ǁn ǀn ǂn⟩, in Juǀʼhõa as ⟨nǃ nǁ nǀ nǂ⟩, and in Zulu, Xhosa, Sandawe, and Naro as ⟨nc nx nq ntc ⟩.
Aspirated nasal clicks, often described as voiceless nasal with delayed aspiration, are widespread in southern Africa, being found in all languages of the Khoe, Tuu, and Kx'a language families, though they are unattested elsewhere. They are typically transcribed something like ⟨ᵑ̊ǃʰ⟩; in Khoekhoe, they are written ⟨ǃh ǁh ǀh ǂh⟩, and in Juǀʼhõa as ⟨ǃʼh ǁʼh ǀʼh ǂʼh⟩. Initially and in citation form, words with these consonants are pronounced with voiceless nasal airflow throughout the production of the click and in some languages for an extended time afterward; this period of up to 150 ms may include weak breathy-voiced aspiration at the end. However, when embedded in a phrase after a vowel they tend to be partially voiced; the preceding vowel will also be nasalized or the click prenasalized, for a realization of vs. They have a tone-depressor effect, so that a level tone on the following vowel will be realized as rising.
The description above is typical, characteristic of languages such as Khoekhoe and Gǀui. However, aspirated nasal clicks have a more extreme pronunciation in Taa, where they need to maintain a distinction from both the plain voiceless and breathy-voiced nasal clicks. In this language they are not voiced after vowel sounds except in rapid speech, and in addition do not have nasal airflow; Trail reports that they instead have active ingressive pulmonic airflow.