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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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Spatially Conditioned Speech Timing: Evidence and Implications.

Jason A Shaw¹, Wei-Rong Chen²

¹Department of Linguistics, Yale University, New Haven, CT, United States.

Frontiers in Psychology

|December 24, 2019

Summary

This summary is machine-generated.

Articulatory Phonology (AP) predicts stable timing between speech sounds, but this study found that the timing between consonants and vowels varies with articulator position. This suggests speech timing may rely on sensory feedback.

Keywords:

CV timing Mandarin Chinese articulatory phonology electromagnetic articulography feedforward control gesture coordination neutral attractor state-based feedback

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Area of Science:

Phonetics and Phonology
Speech Production
Articulatory Phonology

Background:

The two-level feedforward model of Articulatory Phonology (AP) posits invariant inter-gestural timing, independent of articulator spatial position.
This model suggests that phonological structure dictates speech timing, irrespective of the physical state of the vocal tract.
A key prediction is the stability of inter-gestural timing across variations in articulator positioning.

Purpose of the Study:

To test the prediction of stable inter-gestural timing in Articulatory Phonology.
To investigate whether consonant-vowel (C-V) timing is influenced by the spatial position of articulators.
To explore the role of somatosensory feedback in speech timing.

Main Methods:

An Electromagnetic Articulography (EMA) study was conducted with Mandarin speakers.
Participants produced isolated Consonant-Vowel (CV) monosyllables, specifically labial consonants and back vowels.
The study analyzed the correlation between the initial tongue body position and the inter-gestural timing between lips and tongue.

Main Results:

A significant correlation was found between the initial position of the tongue gesture for the vowel and the C-V timing.
Inter-gestural timing was not stable and showed sensitivity to the spatial position of the articulators at the onset of movement.
Findings challenge the strict feedforward control prediction of invariant timing.

Conclusions:

The results suggest that inter-gestural timing in speech production is sensitive to the physical state of the articulators.
Somatosensory feedback may play a crucial role in modulating speech timing, contrary to the purely feedforward account.
The findings necessitate a revision or extension of the Articulatory Phonology model to incorporate feedback mechanisms.