The phonetics and phonology of depressor consonants in Gengbe
Description
The interaction between initial voiced obstruents and lower f0 has been noted for
a variety of languages (Chistovich 1969; Stevens & Klatt 1973; Bradshaw 1999; Tang
2008, to name a few). In some languages, phonetic consonant-f0 interactions that
alter f0 register and/or contour can be phonologized as consonant-tone interac-
tions (Maran 1973; Matisoff 1973). In Gengbe, a Gbe language spoken in Southern
Togo and Benin, obstruent voicing displays several interactions with f0 register
and contour. The goal of this study is to present the synchronic system of Gengbe
consonant-f0 interactions with an eye toward the larger question of phonologiza-
tion. This paper presents both phonetic and phonological data for discussion. Pre-
liminary acoustic data suggest initial voiced obstruents lower the register f0 of fol-
lowing Low and High tone vowels. Phonological data suggest that tonal contour
effects, which change underlying High tone to Rising tone in some environments,
vary based on syntactic category – voiced obstruents trigger Rising tone in nouns,
while voiced obstruents and sonorants trigger Rising tone in verbs. This paper of-
fers a snapshot of a system where at least some consonant-f0 interactions have
been phonologized, adding to the broader understanding of tonogenetic processes.
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