Its vowel height is close, also known as high, which means the tongue is positioned as close as possible to the roof of the mouth without creating a constriction that would be classified as a consonant.
Its vowel backness is back, which means the tongue is positioned as far back as possible in the mouth without creating a constriction that would be classified as a consonant. Unrounded back vowels tend to be centralized, which means that often they are in fact near-back.
It is unrounded, which means that the lips are not rounded.
Possible realization of the unstressed vowel /ɯ/, which is variable in rounding and ranges from central to (more often) back and close to close-mid. Corresponds to /əl/ in other accents. Develops from dark L; See New Zealand English phonology
Asu, Eva Liina; Teras, Pire (2009). "Estonian". Journal of the International Phonetic Association. 39 (3): 367–372. doi:10.1017/s002510030999017x.
Bauer, Laurie; Warren, Paul (2004), "New Zealand English: phonology", in Schneider, Edgar W.; Burridge, Kate; Kortmann, Bernd; Mesthrie, Rajend; Upton, Clive (eds.), A handbook of varieties of English, 1: Phonology, Mouton de Gruyter, pp. 580–602, ISBN3-11-017532-0
Zimmer, Karl; Orgun, Orhan (1999), "Turkish"(PDF), Handbook of the International Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press, pp. 154–158, ISBN0-521-65236-7