Speech perception is influenced by language-specific phonological knowledge. While phonotactics has long been established to play a role, the study of how phonological alternations influence perception is still in its infancy. In this paper, we make a case for the latter by investigating the role of regressive voicing assimilation (RVA) in the perception of obstruent clusters in Emilian dialects of Italian. We provide empirical evidence from a phoneme-detection task, in which Emilian listeners reported to have heard [b] significantly more often in stimuli with a /p/ before a voiced obstruent (RVA context) than before a vowel (non-RVA context). Our experimental findings add to recent work on the influence of phonology on speech perception. In addition, we provide an explicit formalisation, which bolsters the need for a rigid distinction between phonetic, surface and underlying representation, and an explicit mapping between all three, both in the process of speech production and comprehension.

This article argues for the existence of expressive palatalization (E-Pal) – a phonologically unmotivated process that applies in sound symbolism, diminutive constructions, and babytalk registers. It is proposed that E-Pal is grounded in iconic sound-meaning associations exploiting acoustic properties of palatalized consonants and thus is inherently different from regular phonological palatalization (P-Pal). A cross-linguistic survey of patterns of E-Pal in 37 languages shows that it exhibits a set of properties different from P-Pal. The case study focuses on patterns of palatalization in Japanese mimetic vocabulary and babytalk. Two experiments testing native speaker intuitions of these patterns revealed that both patterns exhibit place and manner asymmetries typical of cross-linguistic patterns of E-Pal. The cross-linguistic survey, the two experiments, and analysis of the origins and structural differences of E-Pal and P-Pal provide strong empirical and theoretical motivation to distinguish the two.

Examination of phonetic data can show when phonologization has or has not occurred. Under the general Economy assumption of generative linguistics, this is important for theoretical phonology, since only cases where it has occurred require a phonological account. A modular view of phonetics and phonology is assumed, as it is clearly consistent with generative theory. A procedure for acoustic phonetic testing for phonologization is illustrated using data from one speaker of Palestinian Arabic and one speaker of Stát'imcets Salish. The testing can confirm phonological accounts or cause their revision. How it can cause revision is illustrated with the Stát'imcets data: the speaker's retraction harmony affects a rightward vowel, which is unexpected from standard descriptions of the harmony in that language. The testing can also identify cases of phonetics-within-language. This is illustrated with the St'at'imcets speaker's schwa lowering.