Strident vowels are fairly common inKhoisan languages, which contrasts them with simple pharyngealized vowels. Stridency is used inonomatopoeia inZulu andLamba.[3] Stridency may be a type ofphonation calledharsh voice. A similar phonation, without the trill, is calledventricular voice; both have been calledpressed voice.[citation needed]Bai, of southernChina, has aregister system that hasallophonic strident and pressed vowels.
Subscript double tilde on the letter⟨a⟩ (⟨a᷽⟩), to represent a strident vowel
There is no official symbol for stridency in theIPA, but a superscript ⟨𐞴⟩ (for avoiced epiglottal trill) is often used.[4][5][6] In some literature, a subscript double tilde ⟨◌᷽⟩ (similar to the subscript single tilde ⟨◌̰⟩ used for transcribingcreaky voice) has been used.[1]
Miller-Ockhuizen, Amanda (2003).The phonetics and phonology of gutturals: case study from Juǀʼhoansi. Outstanding dissertations in Linguistics. New York City, NY: Routledge.doi:10.4324/9780203506400.ISBN978-0-415-86141-0.LCCN2003046887.
Moisik, Scott; Czaykowska-Higgins, Ewa; Esling, John H. (Winter 2012). Loughran, Jenny; McKillen, Alanah (eds.). "The Epilaryngeal Articulator: A New Conceptual Tool for Understanding Lingual-Laryngeal Contrasts".McGill Working Papers in Linguistics.22 (1).McGill University.