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Related Experiment Video

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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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Published on: September 27, 2024

Foreign accent conversion in computer assisted pronunciation training.

Daniel Felps1, Heather Bortfeld, Ricardo Gutierrez-Osuna

  • 1Department of Computer Science, Texas A&M University, 3112 TAMU, College Station, TX 77843-3112, USA.

Speech Communication
|December 3, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a voice transformation technique to help second language learners improve pronunciation. By converting a learner's voice to sound like a native speaker, it aids in pronunciation training.

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Area of Science:

  • Speech processing
  • Second language acquisition
  • Phonetics

Background:

  • Learners of a second language (L2) often practice pronunciation by imitating native speakers.
  • Research indicates that imitating a well-matched native speaker positively impacts L2 pronunciation training.
  • Previous computer-assisted pronunciation training (CAPP) has used prosodically corrected feedback.

Purpose of the Study:

  • To propose a voice transformation technique for generating an ideal imitation voice: the learner's own voice with a native accent.
  • To extend previous research by converting both prosodic and segmental speech characteristics.
  • To integrate accent conversion into computer-assisted pronunciation training (CAPP) as a pedagogical strategy.

Main Methods:

  • A novel voice transformation technique based on pitch-synchronous decomposition of speech into glottal excitation and spectral envelope.
  • Application of the technique to a corpus of parallel foreign-accented and native-accented utterances.
  • Validation of accent conversion through perceptual experiments.

Main Results:

  • The proposed technique successfully reduces foreign accentedness.
  • Accent conversion does not significantly alter the voice quality properties of the foreign speaker.
  • Perceptual experiments validated the effectiveness of the accent conversion.

Conclusions:

  • Accent conversion is a viable method for improving L2 pronunciation.
  • The technique can be integrated into CAPP for behavioral shaping.
  • This approach offers a personalized and effective feedback mechanism for L2 learners.