Why Is a Voiced Glottal Plosive Impossible?

The glottal stop occurs in many languages. ... Because the glottis is necessarily closed for the glottal stop, it cannot be voiced. So-called voiced glottal stops are not full stops, but rather creaky voiced glottal approximants that may be transcribed [ʔ̞].

Why are glottal Nasals impossible?

These sounds are called oral stops, or, because of the explosion so typical of them, explosives, or just plosives. ... Nasality is impossible with the glottal stop, in which the vocal folds are pressed together. Because of this, these are not momentary sounds, they can be pronounced for a prolonged time.

Why is a glottal lateral impossible?

For instance, a glottal trill is marked impossible. That's not because there can't be any vibration down in that part of the larynx, but because there's already a name for when the vocal folds vibrate and nothing else is articulated: we call it [ə] (in other words, the most central, mid, neutral vowel).