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Functional data analysis of prosodic effects on articulatory timing
Sungbok Lee1, Dani Byrd, Jelena Krivokapić
1USC Department of Linguistics and USC Viterbi School of Engineering, 3601 Watt Way, GFS 301, Los Angeles, California 90089-1693, USA.
The Journal of the Acoustical Society of America
|April 6, 2006
Summary
Functional data analysis (FDA) offers new ways to study speech timing. FDA time registration reveals that phrase boundaries slow down articulator movement, supporting linguistic theories.
Area of Science:
- Linguistics
- Speech Science
- Data Analysis
Background:
- Traditional articulatory studies use interval durations, losing continuous timing information.
- Linguistic variables like prosody affect articulatory timing, but detailed analysis is challenging.
Purpose of the Study:
- Explore functional data analysis (FDA) for linguistic experimentation.
- Investigate novel advantages of FDA's time-registration method for articulatory timing.
- Analyze continuous kinematic trajectories to understand articulatory patterning.
Main Methods:
- Applied FDA time deformation functions to continuous kinematic trajectories.
- Utilized time alignment to compare speech signals with and without phrase boundaries.
- Examined the influence of phrasal boundaries on articulatory patterning.
Main Results:
- FDA time alignment revealed delaying of articulator movement near phrase boundaries.
- Observed a slowing of the internal clock rate as speech recedes from a boundary.
- This pattern supports theoretical predictions of boundary-adjacent lengthening.
Conclusions:
- FDA time alignment is a valuable tool for analyzing linguistic timing patterns.
- The method effectively characterizes timing in continuous kinematic data.
- FDA enhances the investigation of articulatory timing in speech.