There are four click types: dental, lateral, alveolar, and palatal, each of which found in twelve series or accompaniments (combinations of manner, phonation, and contour).
Additional vowels distinguish, oral, nasal, breathy and creaky phonation types.
The dysphonic voice can be hoarse or excessively breathy, harsh, or rough, but some kind of phonation is still possible (contrasted with the more severe aphonia where phonation is impossible).
This view is more consistent with modern understandings of human physiology and in keeping with stroboscope videos of laryngeal function during vocal phonation.
