Pharyngealised vowels

[Davoush]

I was wondering what exactly do pharyngealised vowels sound like? Are they just a vowel with a pharyngeal fricative/approximant after it or what? Which languages use them?

[Soap]

It covers over the whole vowel. Just imagine a stereotypical "demon" voice and you're probably going to think of the correct thing. But, they dont have to sound harsh. Throat singing is, I believe, essentially just a chant consisting of pharyngealized vowels.

Phaeryngealized vowels are common in some Khoisan languages (but not others), and as allophones of vowels in contact with pharyngealized consonants.

[Tropylium⁺]

Phaeryngealized vowels are common in some Khoisan languages (but not others)

I thought that was epiglottalized, aka strident (with an epiglottal trill coarticulation). Pharyngealization is, IIUC, basically the same as retracted tongue root.