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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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Tracing the Phonetic Space of Prosodic Focus Marking
Simon Roessig1, Bodo Winter2, Doris Mücke1
1IfL-Phonetik, University of Cologne, Cologne, Germany.
Frontiers in Artificial Intelligence
|June 6, 2022
Summary
This study reveals that fundamental frequency, articulation, and intensity are key phonetic cues for marking focus in German. Accentuation shows stronger effects than focus types, highlighting the complexity of prosodic prominence.
Area of Science:
- Phonetics
- Prosody
- Linguistics
Background:
- Focus is conveyed through various phonetic cues.
- Few studies compare multiple phonetic variables for focus marking simultaneously.
Purpose of the Study:
- To analyze 19 phonetic variables for accentuation and different focus types in German.
- To compare the relative importance of phonetic cues in marking prosodic prominence.
Main Methods:
- Analysis of acoustic and articulographic signals of target syllables in German.
- Examined unaccented vs. accented syllables and broad, narrow, contrastive focus types.
Main Results:
- Accentuation effects were most pronounced, particularly in fundamental frequency, intensity, and voice quality.
- Focus type differentiation was more subtle, with fundamental frequency and spectral tilt being significant.
- Articulatory measures showed lower tongue positions and larger lip openings for prominent syllables.
Conclusions:
- Focus is realized through a combination of multiple phonetic cues.
- Fundamental frequency is a crucial cue across accentuation and focus types.
- The study provides insights into the phonetic space of focus marking and the relative importance of different measures.
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