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Relation between voice-onset time and vowel duration
The Journal of the Acoustical Society of America
|September 1, 1979
Summary
English temporal implementation rules affect voice-onset time (VOT) and vowel duration. Findings show VOT changes proportionally less than vowel duration, suggesting simultaneous acoustic interval control.
Area of Science:
- Phonetics and phonology
- Acoustic phonetics
- Speech production
Background:
- Understanding temporal implementation rules in English pronunciation is crucial for speech analysis.
- Previous research has explored acoustic properties of speech sounds, but temporal relationships require further investigation.
Purpose of the Study:
- To investigate the temporal implementation rules of English by measuring voice-onset time (VOT) and vowel duration.
- To examine how phonetic environments influence VOT and vowel duration in New York City speakers.
Main Methods:
- Measurement of voice-onset time (VOT) for initial English stops.
- Measurement of the duration of following voiced vowels in monosyllabic words.
- Analysis of VOT and vowel duration in relation to final consonant clusters and vowel tenseness.
Main Results:
- VOT was longer before voiceless final clusters than single nasals, and before tense vowels than lax vowels.
- Vowel duration was longer in environments with longer VOT, but the ratio was not constant.
- VOT changes were proportionally smaller than vowel duration changes and consistent across different stop places of articulation.
Conclusions:
- Temporal implementation rules simultaneously influence acoustic intervals like VOT and inherent segment durations.
- These rules may operate through independent control of articulatory variables or a common underlying mechanism.