## Bar Chart: Hallucination Suppression @ 1.5 kbps
### Overview
The chart compares hallucination suppression rates across four noise conditions (Clean, SNR 10dB, SNR 5dB, SNR 0dB) using three methods: Baseline, +HuBERT, and +Whisper. Hallucination rates are measured as percentages on the y-axis (20–100%), with suppression improvements annotated as percentage changes.
### Components/Axes
- **X-axis (Noise Condition)**:
Categories: Clean, SNR 10dB, SNR 5dB, SNR 0dB.
- **Y-axis (Hallucination Rate %)**:
Scale: 20% to 100% in 10% increments.
- **Legend**:
- Gray: Baseline
- Blue: +HuBERT
- Red: +Whisper
Positioned at the bottom-right corner.
### Detailed Analysis
1. **Clean Condition**:
- Baseline: ~42% hallucination rate.
- +HuBERT: ~34% (↓26% vs. Baseline).
- +Whisper: ~31% (↓26% vs. Baseline).
2. **SNR 10dB**:
- Baseline: ~87% hallucination rate.
- +HuBERT: ~86% (↓1% vs. Baseline).
- +Whisper: ~80% (↓8% vs. Baseline).
3. **SNR 5dB**:
- Baseline: ~95% hallucination rate.
- +HuBERT: ~91% (↓4% vs. Baseline).
- +Whisper: ~93% (↓2% vs. Baseline).
4. **SNR 0dB**:
- Baseline: ~93% hallucination rate.
- +HuBERT: ~94% (↓1% vs. Baseline).
- +Whisper: ~90% (↓4% vs. Baseline).
### Key Observations
- **Suppression Effectiveness**:
- HuBERT and Whisper reduce hallucination rates most significantly in the Clean condition (↓26%).
- In SNR 10dB, Whisper achieves the largest suppression (↓8%), while HuBERT shows minimal improvement.
- At SNR 0dB, Baseline and HuBERT perform similarly, but Whisper lags by 4%.
- **Anomalies**:
- Whisper underperforms Baseline in SNR 0dB despite prior improvements.
- SNR 5dB shows the smallest suppression gains across all methods.
### Interpretation
The data demonstrates that HuBERT and Whisper consistently reduce hallucination rates, with the most dramatic improvements in low-noise (Clean) and moderate-noise (SNR 10dB) conditions. However, performance degrades in high-noise (SNR 0dB) scenarios, particularly for Whisper. This suggests that noise robustness varies between methods, with HuBERT maintaining more consistent suppression across SNR levels. The anomalies in SNR 0dB and 5dB may indicate trade-offs between noise tolerance and model complexity. For applications requiring reliability in noisy environments, HuBERT appears more stable, while Whisper excels in cleaner conditions.
