Wav2Vec2-Large-Robust finetuned on the revised ETRI Data of Korean-English for Pronunciation Model

Data Information

• Dataset Name: English Pronunciation of Korean Learners (made with ETRI) revised by SNU SLP lab
• Data Type: Speech recordings of Korean learners speaking English, annotated with phoneme sequences.
• Annotation: Each utterance is transcribed at the phoneme level, including pronunciation errors marked with _err. These errors highlight phoneme substitutions, insertions, and deletions that occur due to the influence of the Korean language on English pronunciation.
• Train Set: 14,305 samples
• Valid Set: 1,590 samples
• Test Set: 3,974 samples

Training Procedure

1. Data preprocessing to align audio with phoneme labels.
2. Wav2Vec2-Large-Robust model fine-tuning with CTC loss.
3. Evaluation on validation and test sets.

Training Hyperparameters

• Epochs: 50
• Learning Rate: 0.0001
• Warmup Ratio: 0.1
• Scheduler: Linear
• Batch Size: 8
• Loss Reduction: Mean
• Feature Extractor Freeze: Enabled

Training Results

• Final Training Loss: 0.2415
• Phoneme Error Rate (PER) on Training Set: 0.0508
• Validation Loss: 0.3999
• Phoneme Error Rate (PER) on Validation Set: 0.1622

Test Results

• Phoneme Error Rate (PER): 0.0905

Phoneme Data Example

• Provided Sentence: I'M LOOKING FOR MY PUPPY LUKE HE RAN AWAY THIS MORNING
• True Phonemes of Korean pronunciation: ay m l uh k ih_err ng f er m ay p ah p iy l uw k hh iy l ah n ah w ey dh ih s m ao r n ih_err n
• Predicted Phonemes: ay m l uh k ih ng f er m ay p ah p iy l uh k hh iy l ah n ah w ey dh ih s m ao r n ih_err ng

Training Logs

• events.out.tfevents.1737043507.oem-WS-C621E-SAGE-Series.1534005.0
• events.out.tfevents.1737088179.oem-WS-C621E-SAGE-Series.1534005.1