Voice Onset Time, Frication, and Aspiration in Word-Initial Consonant Clusters

1975 ◽  
Vol 18 (4) ◽  
pp. 686-706 ◽  
Author(s):  
Dennis H. Klatt
Keyword(s):  
Voice Onset Time ◽  
Onset Time ◽  
Consonant Clusters ◽  
Perceptual Cues ◽  
Sentence Frame ◽  
Place Of Articulation ◽  
Connected Discourse ◽  
Production Strategies ◽  
High Vowels ◽  
The Voice

The voice onset time (VOT) and the duration of the burst of frication noise at the release of a plosive consonant were measured from spectrograms of word-initial consonant clusters. Mean data from three speakers reading English words in a sentence frame indicated that the VOT changed as a function of the place of articulation of the plosive and as a function of the identity of the following vowel or sonorant consonant. Burst durations varied in a similar way such that the remaining interval of aspiration in /p, t, k/ was nearly the same duration in comparable phonetic environments. The VOT was longer before sonorants and high vowels than before mid- and low vowels. Aspiration was also seen in an /s/-sonorant cluster. To explain these regularities, production strategies and perceptual cues to a voicing decision for English plosives are considered. Variations in VOT are explained in terms of articulatory mechanisms, perceptual constraints, and phonological rules. Some VOT data obtained from a connected discourse were also analyzed and organized into a set of rules for predicting voice onset time in any sentence context.

Productive Voice Onset Time Characteristics of Esophageal Speech

1978 ◽  
Vol 21 (1) ◽  
pp. 56-62 ◽  
Author(s):  
John M. Christensen ◽  
Bernd Weinberg ◽  
Peter J. Alfonso
Keyword(s):  
Voice Onset Time ◽  
Speech Sound ◽  
Onset Time ◽  
Stop Consonant ◽  
Current Understanding ◽  
Place Of Articulation ◽  
Esophageal Speech ◽  
Phonological Contrasts ◽  
The Voice ◽  
Group Comparisons

The voice onset times (VOT) of a large number of stop-consonant initiated syllables produced by esophageal and normal speakers were measured. Esophageal speakers systematically varied VOT during the production of speech-sound categories with the same manner of production. Average voice onset times associated with the production of prevocalic voiceless stops of esophageal speakers were significantly shorter than those of normal speakers, while talker-group comparisons associated with the production of voiced prevocalic stops were nonsignificant. Voice onset times of both esophageal and normal speakers were differentially sensitive to place of articulation. Findings are discussed in terms of furthering current understanding of how effectively esophageal speakers achieve important phonological contrasts.

Voice onset time in Persian initial and intervocalic stop production

2009 ◽  
Vol 39 (3) ◽  
pp. 335-364 ◽  
Author(s):  
Mahmood Bijankhan ◽  
Mandana Nourbakhsh
Keyword(s):  
Sex Differences ◽  
Fundamental Frequency ◽  
Voice Onset Time ◽  
Onset Time ◽  
Initial Position ◽  
Place Of Articulation ◽  
Vowel Context ◽  
Significant Difference ◽  
Voiceless Stop ◽  
High Vowels

The purpose of this study is to examine voice onset time as a phonetic correlate of voicing distinction in standard Persian. Issues pertinent to VOT are also addressed: namely, the effect of place of articulation, vowel context and sex of speakers. The VOTs were measured from recordings of five male and five female speakers reading 65 words that contained a full set of Persian oral stops in word initial and intervocalic positions. This acoustic experiment indicated that VOT distinguishes voiced from voiceless stops. The results also revealed that Persian uses mainly {voiceless unaspirated} and {voiceless aspirated} categories for [±voice] distinction in initial position and {voiced} and {voiceless aspirated} categories in intervocalic position. Vowel context also affected VOT values but the only significant difference was due to high vowels, which caused the preceding voiceless stop to have a longer VOT. Examining sex differences in the VOT values indicated that for voiced items females produced longer VOTs than males. However, voiceless items displayed no significant sex differences for VOT values. Fundamental frequency (F0) of the onset of the following vowel was also examined as another cue to voice distinction. Although the F0 values of voiceless tokens were higher than those of the voiced ones in each voiced–voiceless category, the results suggest that F0 is not a major cue distinguishing the two stop categories.

The perceptual acquisition of Thai phonology by English speakers: task and stimulus effects

2003 ◽  
Vol 19 (3) ◽  
pp. 209-223 ◽  
Author(s):  
Joe Pater
Keyword(s):  
Voice Onset Time ◽  
Onset Time ◽  
Acoustic Properties ◽  
Experimental Conditions ◽  
Lexical Representations ◽  
Place Of Articulation ◽  
Task Effects ◽  
Stimulus Effects ◽  
Parallel Effect ◽  
Native Speakers Of English

This article presents a follow-up to Curtin et al.’s study of the perceptual acquisition of Thai laryngeal contrasts by native speakers of English, which found that subjects performed better on contrasts in voice than aspiration. This finding - surprising in light of earlier cross-linguistic voice onset time (VOT) research - was attributed to the fact that the task tapped lexical representations, which are unspecified for aspiration according to standard assumptions in generative phonology. The present study further investigated possible task effects by examining the discrimination and categorization of the same stimuli in various experimental conditions. Stimulus effects were also investigated by performing token-based analyses of the results, and by comparing them to acoustic properties of the tokens. The outcome of the discrimination experiment was the opposite of the earlier study, with significantly better performance on contrasts in aspiration than voice, even on a lexical task. A second finding of this experiment is that place of articulation interacts with the perception of the laryngeal distinctions; the aspiration distinction is discriminated better on the labials, and voice on alveolars. A parallel effect of place of articulation was also found in a categorization experiment.

scholarly journals Phonetic structures of Turkish Kabardian

2006 ◽  
Vol 36 (2) ◽  
pp. 159-186 ◽  
Author(s):  
Matthew Gordon ◽  
Ayla Applebaum
Keyword(s):  
Voice Onset Time ◽  
Spectral Characteristics ◽  
Onset Time ◽  
Aerodynamic Characteristics ◽  
Rare Type ◽  
Place Of Articulation ◽  
Short Vowels ◽  
Closure Duration ◽  
Phonetic Study ◽  
Phonetic Realization

This paper reports results of a quantitative phonetic study of Kabardian, a Northwest Caucasian language that is of typological interest from a phonetic standpoint. A number of cross-linguistically rare properties are examined. These features include the phonetic realization of Kabardian's small vowel inventory, which contains only three contrastive vowel qualities (two short vowels and one long vowel), spectral characteristics of the ten supralaryngeal voiceless fricatives of Kabardian, as well as the acoustic, palatographic, and aerodynamic characteristics of ejective fricatives, an extremely rare type of segment cross-linguistically. In addition, basic properties of the consonant stop series are explored, including closure duration and voice onset time, in order to test postulated universals linking these properties to place of articulation and laryngeal setting.

Variation in Voice Onset Time for Korean Stops

2006 ◽  
Vol 13 ◽  
pp. 1-16 ◽  
Author(s):  
David J. Silva
Keyword(s):  
United States ◽  
Native Speakers ◽  
Voice Onset Time ◽  
Onset Time ◽  
The United States ◽  
Age Group ◽  
Acoustic Data ◽  
Diachronic Change ◽  
Phonemic Level ◽  
The Voice

Abstract. Acoustic data elicited from 34 native speakers of Korean living in the United States pro-vide evidence for diachronic change in the voice onset time (VOT) of phrase-initial aspirated and lax stop phonemes. While older speakers produce aspirated and lax stops with clearly differentiated average VOT values, many younger speakers appear to have neutralized this difference, producing VOTs for aspirated stops that are substantially shorter than those of older speakers, and comparable to those for corresponding lax stops. The data further indicate that, within each age group, older speakers manifest sex-based differences in VOT while younger speakers do not. Despite this appar-ent shift in VOT values, the acoustic evidence suggests that all speakers in this study, regardless of age, continue to mark underlying differences between aspirated and lax stops in terms of stop closure and the fundamental frequency of the following vowel. It is concluded that the data point to a recent phonetic shift in the language, whereby VOT no longer serves as the primary cue to differentiate between lax and aspirated stops. There is not, however, evidence of any reorganization of the lan-guage as the phonemic level: the language's underlying lax ~ aspirated ~ tense contrasts endure.

scholarly journals Comparison of plosive sounds in monolingual and bilingual children, using the voice onset time acoustic parameter: cases report

Revista CEFAC ◽  
2018 ◽  
Vol 20 (5) ◽  
pp. 680-687
Author(s):  
Maria Teresa R. Lofredo-Bonatto ◽  
Marta A. Andrada e Silva
Keyword(s):  
Voice Onset Time ◽  
Onset Time ◽  
Acoustic Signals ◽  
Brazilian Portuguese ◽  
Acoustic Parameter ◽  
Bilingual Children ◽  
The Voice

ABSTRACT The purpose was to compare differences in production of plosive phonemes through the voice onset time (VOT) measurement in the speech of monolingual children, speakers of Brazilian Portuguese and bilingual children, speakers of both Brazilian Portuguese and English. The sample consisted of three monolingual children and three bilingual children; average age was 7 years. A speech emission was recorded for the investigation, which had the following vehicle phrase: “Diga ‘papa’ baixinho” (“Say ‘papa’ quietly”). Papa was then replaced by “baba”, “tata”, “dada”, “caca” and “gaga”. The measurements of the acoustic signals were performed through broadband spectrograms, and VOT was descriptively analyzed for the non-voiced sounds [p, t, k] and voiced [b, d, g] plosive sounds. Monolingual children presented higher average VOT values for [p, t, k] compared to bilingual children. For the [b, d, g] sounds, monolingual children had lower average VOT values, as compared to bilingual children. It was concluded that in the comparison of VOT measures of the speech samples, the monolingual children of Brazilian Portuguese presented higher values for the non voiced ones and lower for the voiced ones in relation to the bilingual children speakers of Brazilian Portuguese and English.

Cross-language correspondences in the face of change: Phonetic independence versus convergence in two Korean-Mandarin bilingual communities

2017 ◽  
Vol 23 (1) ◽  
pp. 157-199
Author(s):  
Jessamyn Schertz ◽  
Yoonjung Kang ◽  
Sungwoo Han
Keyword(s):  
Language Change ◽  
Voice Onset Time ◽  
Onset Time ◽  
Two Dimensions ◽  
Place Of Articulation ◽  
The Face ◽  
Tightly Coupled ◽  
Bilingual Communities ◽  
Cross Language ◽  
Over Time

Aims and Objectives/Purpose/Research Questions: We investigate the robustness of cross-language phonetic correspondences in two bilingual communities over time, focusing on whether corresponding sounds (e.g. Mandarin /s/ and Korean /s’/) remain coupled in the face of language change, or whether the categories diverge over time in younger, more proficient bilinguals. Design/Methodology/Approach: We quantify the extent of assimilation versus independence of categories across languages by comparing bilinguals’ production of place of articulation and laryngeal contrasts in Mandarin and Korean sibilants. Distinct language-internal changes were expected on each dimension. Data and analysis: 107 speakers varying in age (aged 19–83), gender, and dialect participated in the study. Acoustic measurements (center of gravity of frication, voice onset time) and statistical analyses were performed on a total of ~11,000 tokens. Findings/Conclusions: The extent of cross-language independence differed on the two dimensions. Corresponding segments across the two languages remained tightly coupled in terms of place of articulation, even in the face of change; on the other hand, a language-internal change in the Korean laryngeal contrast left corresponding Mandarin segments unaffected, resulting in divergence of originally corresponding categories. We also found unpredicted changes on each dimension, and these changes progressed concurrently in the two languages. Originality: The study of correspondences in the context of independent sound change provides a unique perspective from which to evaluate the robustness of cross-language interaction, and the parallel analysis of two separate dimensions in two communities adds to the generalizability of results. Significance/Implications: Most changes occurred concurrently in the two languages, suggesting that similar phonetic categories across languages can remain tightly coupled, even in highly proficient bilinguals where phonetic independence is expected. However, one of the primary expected changes (voice onset time merger in Korean) did not affect corresponding segments in Mandarin, indicating that the extent of cross-language independence in phonetic correspondences may differ even within the same population. We discuss potential reasons for the different results.

Speakers' Sex Differences in Voice Onset Time: Some Preliminary Findings

1997 ◽  
Vol 85 (2) ◽  
pp. 459-463E ◽  
Author(s):  
Sandra P. Whiteside ◽  
Caroline J. Irving
Keyword(s):  
Sex Differences ◽  
Voice Onset Time ◽  
Onset Time ◽  
The Voice

This study presents a brief investigation into sex differences of speakers in the voice onset time of English plosives that are stressed in both word-initial and prevocalic position. 72 short phrases were presented to 5 men (range 25 to 37 years, mean age 34.2 yr.) and five women speakers (range 28 to 38 years, mean 32.6 yr.). Analysis showed that the women as speakers had on average, longer voice onset time values than their male peers.

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