Phonetic Enhancement and Three Patterns of English a-Tensing

English a-tensing has received numerous treatments in the phonological and sociolinguistic literature, but the question of why it occurs (i) at all and (ii) in seemingly unnatural disjunctive phonological environments has not been settled. This paper presents a novel phonetic enhancement account of a-tensing in Philadelphia, New York City and Belfast English. I propose that a-tensing is best understood as an allophonic process which facilitates the perceptual identity and articulatory ease of nasality, voicing and/or segment duration in the following consonant. This approach unifies the apparently unnatural phonological environments in which the two a variants surface and predicts the attested dialectal patterns. A synchronic account of a-tensing also provides an explanation for the suprasegmental and morphological factors that condition the process

Perceptually Based Constraints and Metathesis: Evidence from Artificial Grammar

The present paper explores the role of sonority and other perceptual constraints in governing syllable structure constraints. One of the most important issues in phonology today is the formalization of the phonetic grounding of markedness constraints (Hayes and Steriade 2004). Sonority constraints have been particularly controversial because there is no formalized definition of sonority, but rather several different contributing factors, such as intensity, constriction and formant transitions, that all vary depending on context (Henke, Kaisse, and Wright 2012; Wright 2004). This paper makes use of an artificial grammar learning paradigm, whereby adult English speakers were exposed to a consonant-consonant metathesis pattern that either improved sonority at a syllable boundary, or worsened sonority at a syllable boundary. Learners did not show generalization in line with sonority-based syllable contact laws, but instead showed generalization in accordance with avoidance of a voiced obstruent in coda position, thus supporting a theory of sonority and syllable contact that makes use of the interaction of perceptual cues, rather than a strict, abstract sonority hierarchy

Consonantal F0 perturbation in American English involves multiple mechanisms.

In this study, we revisit consonantal perturbation of F0 in English, taking into particular consideration the effect of alignment of F0 contours to segments and the F0 extraction method in the acoustic analysis. We recorded words differing in consonant voicing, manner of articulation, and position in syllable, spoken by native speakers of American English in both statements and questions. In the analysis, we compared methods of F0 alignment and found that the highest F0 consistency occurred when F0 contours were time-normalized to the entire syllable. Applying this method, along with using syllables with nasal consonants as the baseline and a fine-detailed F0 extraction procedure, we identified three distinct consonantal effects: a large but brief (10-40 ms) F0 raising at voice onset regardless of consonant voicing, a smaller but longer-lasting F0 raising effect by voiceless consonants throughout a large proportion of the following vowels, and a small lowering effect of around 6 Hz by voiced consonants, which was not found in previous studies. Additionally, a brief anticipatory effect was observed before a coda consonant. These effects are imposed on a continuously changing F0 curve that is either rising-falling or falling-rising, depending on whether the carrier sentence is a statement or a question

Dominance, mode, and individual variation in bilingual speech production and perception

Early Spanish-English bilinguals and English controls were tested on the production and perception of negative, short-lag, and long-lag Voice Onset Time (VOT). These VOT types span Spanish and English phonetic categories. Phonologically, negative and short-lag VOT stops are distinct phonemes in Spanish, while both are realizations of voiced stops in English. Dominance was critical: more English-dominant bilinguals produced more short-lag VOT stops in response to negative VOT stimuli, and were less accurate than more balanced bilinguals at discriminating negative from short-lag VOT. Bilinguals performed similarly to monolinguals overall, but they produced more negative VOT tokens and shorter short-lag VOT in response to negative VOT. Their productions were also less well correlated with perception and showed more variation between individuals. These results highlight the variable nature of bilingual production and perception, and demonstrate the need to consider language dominance, individual variation, as well as modalities and tasks when studying bilinguals

Transphonologization of voicing in Chru:Studies in production and perception

Chru, a Chamic language of south-central Vietnam, has been described as combining contrastive obstruent voicing with incipient registral properties (Fuller, 1977). A production study reveals that obstruent voicing has already become optional and that the voicing contrast has been transphonologized into a register contrast based primarily on vowel height (F1). An identification study shows that perception roughly matches production in that F1 is the main perceptual cue associated with the contrast. Structured variation in production suggests a sound change still in progress: While younger speakers largely rely on vowel height to produce the register contrast, older male speakers maintain a variety of secondary properties, including optional closure voicing. Our results shed light on the initial stages of register formation and challenge the claim that register languages must go through a stage in which breathiness or aspiration is the primary contrastive property (Haudricourt, 1965; Wayland & Jongman, 2002; Thurgood, 2002). This article also complements several recent studies about the transphonologization of voicing in typologically diverse languages (Svantesson & House, 2006; Howe, 2017; Coetzee, Beddor, Shedden, Styler, & Wissing, 2018)

The Effect of Instructed Second Language Learning on the Acoustic Properties of First Language Speech

This paper reports on a comprehensive phonetic study of American classroom learners of Russian, investigating the influence of the second language (L2) on the first language (L1). Russian and English productions of 20 learners were compared to 18 English monolingual controls focusing on the acoustics of word-initial and word-final voicing. The results demonstrate that learners’ Russian was acoustically different from their English, with shorter voice onset times (VOTs) in [−voice] stops, longer prevoicing in [+voice] stops, more [−voice] stops with short lag VOTs and more [+voice] stops with prevoicing, indicating a degree of successful L2 pronunciation learning. Crucially, learners also demonstrated an L1 phonetic change compared to monolingual English speakers. Specifically, the VOT of learners’ initial English voiceless stops was shortened, indicating assimilation with Russian, while the frequency of prevoicing in learners’ English was decreased, indicating dissimilation with Russian. Word-final, the duration of preceding vowels, stop closures, frication, and voicing during consonantal constriction all demonstrated drift towards Russian norms of word-final voicing neutralization. The study confirms that L2-driven phonetic changes in L1 are possible even in L1-immersed classroom language learners, challenging the role of reduced L1 use and highlighting the plasticity of the L1 phonetic system

Voiceless stop lenition and reduction as linguistic and social phenomena in Concepción, Chile

  This study investigates voiceless stop lenition in Chilean Spanish.  Recent studies (e.g. Pérez 2007, Figueroa & Evans 2014 among others) have documented high levels of lenition of /bdg/ in Chilean Spanish.  As a result, the present study seeks to document the degree to which the voiceless stops /ptk/ undergo lenition in this variety of Spanish. Furthermore, the relationship between lenition and social factors (e.g., age, gender, and socioeconomic stratification) is examined.  Data was taken from the sociolinguistic interviews of 32 speakers from the Province of Concepción, Chile. In all, 4,419 intervocalic tokens of /ptk/ were analyzed for lenition using three different measurement criteria: total voicing, articulatory reduction, and duration.  Results confirm that, according to all three criteria, elevated levels of lenition are observed in the production of /ptk/ in Concepción.  Likewise, results indicate that as a social phenomenon, voiceless stop lenition in Concepcion is primarily conditioned by age and gender

Inter-consonantal intervals in Tripolitanian Libyan Arabic: Accounting for variable epenthesis

This paper reports on an acoustic investigation of inter-consonantal intervals in plosive sequences in Tripolitanian Libyan Arabic (TLA). TLA permits a wide range of two, three, and four-consonant strings within and across word boundaries. Previous descriptive work has suggested that TLA is characterized by widespread, partly optional vowel epenthesis throughout these sequences. We conducted a production study to investigate the phonetic and phonological properties of inter-consonantal intervals (ICIs) in these sequences, including their durations and voicing characteristics, as well as the voicing of surrounding plosive hold phases. Our aim was to assess the extent of ‘variable epenthesis’ and narrow down the range of possible accounts for it. Unlike many previous studies, we did not rely on native speaker intuitions and made minimal use of manual categorical coding, instead focusing on modelling distributions of continuous acoustic parameters. The central question we address is whether our data contain patterns that can only be explained with reference to phonological vowel insertion—given that variable epenthesis can also be accounted for in terms of vocoid intrusion alone (Hall, 2006). Our study improves our understanding of consonant articulations in Arabic, and of epenthesis and related phenomena