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The contrast between clear and plain speaking style for Mandarin tones
Paul Tupper1, Keith W Leung2, Yue Wang2
1Department of Mathematics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
The Journal of the Acoustical Society of America
|January 1, 2022
Summary
Clear speech enhances Mandarin tones by increasing duration and intensity. Specific tones also show changes in fundamental frequency (F0) and slope, improving clarity and distinctiveness.
Area of Science:
- Phonetics
- Acoustic Phonetics
- Linguistics
Background:
- Mandarin tones are crucial for lexical meaning.
- Conversational speech styles can affect phonetic realization.
- Clear speech is often used to improve intelligibility.
Purpose of the Study:
- To investigate acoustic differences in Mandarin tones between plain and clear speech.
- To identify specific acoustic cues modified in clear speech.
- To understand how clear speech enhances Mandarin tone perception.
Main Methods:
- Analysis of 2045 Mandarin tone productions from 21 native speakers.
- Comparison of plain versus clear speaking styles.
- Measurement of acoustic cues: F0 (mean, slope, second derivative), duration, intensity, and creaky voice.
Main Results:
- Clear speech significantly increased duration and mean intensity for all tones.
- Tones 2 and 3 exhibited increased mean F0, while Tone 4 showed an increased slope.
- Contour tones were lengthened in duration without altering the F0 range.
Conclusions:
- Clear speech modifies acoustic properties of Mandarin tones to enhance signal clarity.
- Changes in duration, intensity, and F0 contribute to improved tone distinctiveness.
- Findings support both signal-based and code-based explanations for speech style effects on tones.
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