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Related Experiment Video

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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

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Published on: September 27, 2024

Formant transitions in varied utterance positions.

Christina Kuo¹

¹Department of Communicative Disorders and Waisman Center, University of Wisconsin-Madison, Madison, Wisc., USA.

Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)

|December 21, 2013

Summary

Acoustic analysis reveals that contrastive stress, not utterance position, significantly alters speech sound transitions. This highlights the impact of stress on articulatory changes and vocal tract shaping.

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Area of Science:

Phonetics
Speech Science
Acoustic Analysis

Background:

Utterance positions can influence speech acoustics due to articulatory adjustments near boundaries.
Understanding these acoustic consequences is crucial for speech production research.

Purpose of the Study:

To investigate acoustic characteristics of speech sounds at varied utterance positions.
To examine the impact of articulatory changes near utterance boundaries on acoustic output.

Main Methods:

Analyzed second formant transition characteristics (duration, extent, slope) in 12 American English speakers.
Examined diphthong and consonant-vowel transitions in initial, final, and end utterance positions.
Utilized a contrastive stress variation task to assess articulatory change.

Main Results:

Contrastive stress led to longer transition durations and greater transition extents.
A decreased slope of transition was observed with increased stress.
No systematic utterance position effects related to boundary strengthening or declination were identified.

Conclusions:

Varied utterance positions are associated with stimulus-dependent articulatory variations reflected in acoustic output.
Findings underscore the need for further research into utterance-level speech materials, like carrier phrases, for clinical and research applications.