Editing Nasal vowel (section)

==Influence on vowel height==
[[Nasalization]] as a result of the [[Assimilation (linguistics)|assimilation]] of a [[nasal consonant]] tends to cause a raising of [[Vowel#Height|vowel height]]; phonemically distinctive nasalization tends to lower the vowel.<ref>Beddor, P. S. 1983. ''Phonological and phonetic effects of nasalization on vowel height''</ref> According to a different assessment, high vowels do tend to be lowered, but low vowels tend to be raised instead.<ref>[https://www.eva.mpg.de/lingua/conference/10-PhoneticUniversals/pdf/Carignan_et_al.pdf Carignan, Christopher et al. 2010. Lingual response to vowel nasalization. Conference on Phonetic Universals, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany, October 2010]</ref>

In most languages, vowels of all heights are nasalized indiscriminately, but preference occurs in some languages, such as for high vowels in [[Chamorro language|Chamorro]] and low vowels in [[Thai language|Thai]].<ref>Hajek, John. (2013). Vowel Nasalization. In M. Dryer & M. Haspelmath (eds.), ''The World Atlas of Language Structures Online''. Retrieved 30 March 2019 from [https://wals.info/chapter/10]</ref>