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Coarticulation in slow speech: durational and spectral analysis
1Dept. of Neurology, University of Tübingen, Germany. ingo.hertrich@uni-tuebingen.de
Language and Speech
|April 1, 1995
Summary
This study on German speech sounds reveals distinct acoustic patterns for anticipatory and perseverative coarticulation. Slowing speech rate reduced perseverative coarticulation while anticipatory effects remained unchanged.
Area of Science:
- Phonetics
- Acoustic Speech Analysis
- Speech Production
Background:
- Coarticulation, the influence of adjacent speech sounds, is crucial for natural speech.
- Understanding anticipatory and perseverative coarticulation mechanisms is key to speech production research.
- Previous research suggests different underlying mechanisms for these coarticulation types.
Purpose of the Study:
- To investigate durational and spectral features of anticipatory and perseverative coarticulation in German.
- To compare these features at comfortable and slowed speech rates.
- To determine if speaking rate affects different coarticulation types differently.
Main Methods:
- Acoustic analysis of German sentence utterances from six young female speakers.
- Systematic variation of nonsense words within carrier phrases.
- Measurement of durational and spectral features of speech signals at two speaking rates.
Main Results:
- Anticipatory and perseverative coarticulation exhibited distinct durational and spectral patterns.
- Significant inter-speaker variability was observed, especially in anticipatory vowel-to-vowel coarticulation.
- Slowing the speaking rate decreased perseverative coarticulation but did not alter anticipatory effects.
Conclusions:
- The findings support the hypothesis that anticipatory and perseverative coarticulation are governed by different physiological mechanisms.
- Acoustic measures effectively differentiate between the two coarticulation types.
- Speaking rate modulation impacts perseverative coarticulation more than anticipatory coarticulation.