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Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography
Published on: July 26, 2019
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Effect of source filter interaction on isolated vowel-consonant-vowel perception
Achuth Rao M V1, Shiny Victory J2, Prasanta Kumar Ghosh1
1Indian Institute of Science, Bangalore, India.
The Journal of the Acoustical Society of America
|September 6, 2018
Summary
The study investigated pitch changes in voiced consonants during speech production. Modifying the pitch contour did not significantly affect the perceived naturalness of synthesized vowel-consonant-vowel syllables.
Area of Science:
- Phonetics
- Speech Acoustics
- Psychoacoustics
Background:
- Source-filter interaction is theorized to cause pitch drop in voiced consonants during vowel-consonant-vowel (VCV) production.
- Vocal tract constriction during consonant articulation influences acoustic properties.
Purpose of the Study:
- To investigate the perceptual relevance of pitch drop during voiced consonants in VCV production.
- To determine if modifying the pitch contour affects the naturalness of synthesized speech.
Main Methods:
- A perceptual study was conducted using synthesized VCV utterances.
- The pitch contour in the voiced consonant region was systematically modified to four distinct levels.
- A listening test was administered with 30 participants to rate the naturalness of the synthesized VCVs.
Main Results:
- No statistically significant difference was found in perceived naturalness between original and synthesized VCVs with modified pitch contours.
- The perceptual impact of pitch contour modification in the voiced consonant region was minimal.
Conclusions:
- Pitch drop due to source-filter interaction may not be a critical factor for the perceived naturalness of VCVs.
- Speech synthesis models may not need to precisely replicate this specific pitch contour behavior for naturalness.
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