0 Phonological contrast and phonetic variation: the case of velars in Iwaidja Jason A. Shaw, Yale University,
[email protected] Yale University, Department of Linguistics 370 Temple Street, New Haven CT 06511 Christopher Carignan, University College London,
[email protected] Tonya Agostini, University of Wollongong,
[email protected] Robert Mailhammer, Western Sydney University,
[email protected] Mark Harvey, University of Newcastle,
[email protected] Donald Derrick, University of Canterbury,
[email protected] 1 Abstract: A field-based ultrasound and acoustic study of Iwaidja, an endangered Australian aboriginal language, investigated the phonetic identity of non-nasal velar consonants in intervocalic position, where past work had proposed a [+continuant] vs [-continuant] phonemic contrast. We analyzed the putative contrast within a continuous phonetic space, defined by both acoustic and articulatory parameters, and found gradient variation from more consonantal realizations, e.g. [ɰ], to more vocalic realizations, e.g. [a]. The distribution of realizations across lexical items and speakers did not support the proposed phonemic contrast. This case illustrates how lenition that is both phonetically gradient and variable across speakers and words can give the illusion of a contextually restricted phonemic contrast.* Keywords: Iwaidja, phonetic variation, lenition, ultrasound, manner, velar approximants * We would like to thank the participants in this study as well as Charlie Mangulda, David Cooper, James Cooper, Henry Guwiyul, †Ilijili Lamilami, Isobel Lamilami, and Maggi Maburnbi for sharing their languages and their insights on Iwaidja and Iwaidja culture with us. The dictionary that formed the basis of the work was originally assembled by Bruce Birch and Nick Evans.