Propriétés acoustiques de l'harmonie vocalique en twi : le cas des voyelles nasales
Kofi Adu Manyah.

This paper investigates acoustic properties of the Twi nasal vowel counterparts of the oral vowels /i/ vs /I/ and /u/ vs /U/ investigated in a previous study of ATR vowel harmony. Acoustic measurements are carried out to investigate for differences between vowel quality in the 2 groups. The evidence from our acoustic data, confirming results obtained for the oral vowels, is the tendency for advanced vowels [+ATR] to have lower F1 values, higher F2 and F3 values than the unadvanced vowels.