chapter  1
12 Pages


The transition from an acoustic bias to an articulatory bias in feature theory has been made without any explicit claim that phonology is based purely on articulation, let alone arguments in favour of such a claim. In fact, both Jakobson, Fant, and Halle (1952) and Chomsky and Halle (1968:299) state that features should be defined in both articulatory and acoustic terms, so the substantial de facto change between these two feature systems was not accompanied by any explicit theoretical shift1.