Phonetics in Phonology and Phonology in Phonetics*
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Working Papers of the Cornell Phonetics Laboratory 2007, v.16, pp. 1-31 Phonetics in Phonology and Phonology in Phonetics* Abigail C. Cohn In this paper, I explore the relationships between phonology and phonetics and argue that there are two distinct ways that they interact. A distinction needs to be drawn between the way phonetics affects phonology–phonetics in phonology, and the way phonology affects or drives phonetics–phonology in phonetics. The former concerns the way that phonetic effects and constraints are reflected in the phonology, often referred to as naturalness. The latter is the mapping between the units of phonology and their physical realization. How is phonological knowledge realized in and extracted from the physical signal? In this case, the phonology emerges in the phonetics in the sense that phonological contrast is physically realized. These two facets of the relationship between phonology and phonetics are discussed in light of their implications for an understanding of phonology and phonetics and their relationship. 1. Introduction The aim of this paper is to consider the different ways in which phonology and phonetics interact. Let us start by considering a fairly standard post-Sound Pattern of English (SPE, Chomsky and Halle 1968) view of the relationship shown in (1). (1) The relationship between phonology and phonetics: phonology = discrete, categorical ≠ phonetics = continuous, gradient It is widely assumed that phonology and phonetics are distinct and that phonology is the domain of discrete and categorical entities, while phonetics is the domain of the continuous and gradient. (For recent discussion see e.g. Keating 1996; Cohn 1998; also * This discussion consists of parts of a paper presented at the 11th Manchester Phonology Meeting and the Greater NY Phonetics and Phonology Workshop, under the same title and one presented at the University of Buffalo and Cornell University Linguistics Colloquia entitled “Phonology vs. phonetics, revisited”. Thanks to members of those audiences for helpful questions and comments and to Ioana Chitoran, Amanda Miller, Michael Wagner, and a WPCPL reviewer for comments and suggestions on an earlier draft of this paper. Those presentations also served as the jumping off point for Cohn (2006) “Is there gradient phonology?” for which this paper serves as a backdrop. 2 PHONETICS IN PHONOLOGY AND PHONOLOGY IN PHONETICS individual contributions in Burton-Roberts et al. 2000; and Hume and Johnson 2001). Yet much debate surrounds the relationship between phonology and phonetics. Questions such as the following continue to be asked: How strong is this correlation? How do phonetics and phonology interact? Are they in fact one in the same thing? I argue that there are actually two distinct ways in which phonology and phonetics interact. A distinction needs to be drawn between the way phonetics affects phonology– what I term phonetics in phonology–and the way phonology affects or drives phonetics– what I term phonology in phonetics. This is a basic point, but one that I believe has been largely overlooked. Both of these facets of the relationship need to be addressed in reaching an understanding of the nature of phonology and phonetics. In this brief discussion, I outline both facets of the relationship. In the first, the place of naturalness, as internal to the grammar, or outside of it, is central. In the second, the strength of the correlation suggested in (1)–that is, that phonology is discrete and categorical, while phonetics is continuous and gradient–is important. The evidence suggests that this correlation may not be as strong as often assumed. However, this does not necessarily lead to the conclusion that, therefore, phonology and phonetics are the same thing. Our discussion leads to a (re)consideration of certain fundamental assumptions, notably the role of modularity and the status of so-called duplication—cases where similar patterns are attributed to more than one domain of language, as well as a brief consideration of the nature of categories. The structure of the paper is as follows. In §2, I discuss phonetics in phonology and in §3, I turn to phonology in phonetics. In §4, I consider the implication of these two facets of the relationship for a better understanding of the nature of phonology and phonetics. Conclusions and implications for future research are presented in §5. 2. Phonetics in phonology As shown in the work of Ohala and others (e.g. Ohala 1990), a close parallel exists between phonetic patterns of coarticulation and phonological patterns of assimilation cross-linguistically. These widely observed parallels raise the question of why this should be the case. It is generally agreed that the phonetic patterns arise from ABIGAIL C. COHN 3 physical (articulatory, aerodynamic, acoustic and auditory) constraints. Patterns attributable to such factors are said to be natural. The close parallel between the phonetic effects and phonological patterns has led many to suppose that phonetic naturalness is a primary source of phonological patterns, that the phonology is grounded in the phonetics (e.g. Archangeli and Pulleyblank 1994). Yet there is much debate about where naturalness resides, within or outside the grammar. Naturalness is sometimes framed in terms of markedness. One’s characterization of naturalness depends in large part on certain underlying assumptions about the nature of grammar and modularity as well as the nature of synchronic vs. diachronic systems. I briefly sketch out different approaches in §2.1 and then return to the parallels between coarticulation and assimilation and implications of these parallels in §2.2. 2.1 Why is phonology natural? Much attention has been given to the question: Why is phonology natural? Different ideas about where naturalness resides have been espoused, depending in part on one’s starting assumptions. I do not attempt here to resolve this complex question, but provide only a brief overview of the subject. (See Chitoran 2005; Chitoran and Cohn to appear; and Hayes and Steriade 2004, for recent discussion.) Many understand naturalness to be part of phonology. The status of naturalness in phonology relates back to early debates in generative phonology about natural phonology and natural generative phonology (Stampe 1979 among others). This view is also foundational to Optimality Theory (e.g. Prince and Smolensky 2004), where functional explanations characterized in scalar and gradient terms are central in the definition of the family of markedness constraints. Contra views “where the principles that the rules subserve (the “laws”) are placed entirely outside the grammar. A much stronger stance [, …, ] is available. When the scalar and the gradient are recognized and brought within the purview of theory, Universal Grammar can supply the very substance from which grammars are built.” (Prince and Smolensky 2004, p. 233-234.) Under such approaches the explanations of naturalness are connected to the notion of markedness. However, this does not offer an explanation without having an independently motivated theory of 4 PHONETICS IN PHONOLOGY AND PHONOLOGY IN PHONETICS markedness. (See Hume 2004 and Haspelmath 2006 for recent discussion of this issue.) It is sometimes argued that explicit phonological accounts of naturalness pose a duplication problem. Formal accounts in phonological terms (often attributed to Universal Grammar) parallel or mirror the phonetic roots of such developments, thus duplicating the phonetic source or historical development driven by the phonetic source. This leads to a duplication of the explanation (see Przezdziecki 2005 for recent discussion). As discussed below, it doesn’t necessarily follow that distinct representations and accounts of the patterns themselves (phonological assimilation and phonetic coarticulation) also result in duplication. If, as concluded below, assimilation and coarticulation are similar, but not identical, then treating them as the same thing is not empirically adequate. We need to draw a distinction between the duplication of the explanation and the source of the patterns themselves. This view of naturalness’ centrality in the synchronic grammar is the source of the form vs. substance debate as framed by Hale and Reiss (2000), where they argue for a complete separation of substance from form. They argue that phonology = grammar = formal and phonetics = substance = function. This approach is closely tied to assumptions about strict modularity, an issue to which we return below (§4.2). Others understand naturalness to be expressed through diachronic change. This is essentially the view of Hyman (1976, 2001). Hyman (1976) offers an insightful historical understanding of this relationship through the process of phonologization, whereby phonetic effects can be enhanced and over time come to play a systematic role in the phonology of a particular language. Under this view, phonological naturalness results from the grammaticalization of low-level phonetic effects. This provides a diachronic explanation of these types of effects. While a particular pattern might be motivated historically as a natural change, it might be un-natural in its synchronic realization (see Hyman 2001 for discussion). Phonetic motivation is also part of Blevins (2004) characterization of types of sound change. We are still left with the unresolved question: Is synchronic phonology independently constrained by principles of naturalness? This leads us to the still timely discussion by Anderson (1981)