Copyright (c) 2026 MindMesh Academy. All rights reserved. This content is proprietary and may not be reproduced or distributed without permission.
6.2.4. Custom Speech and Word Error Rate (WER)
Word Error Rate measures speech recognition accuracy. Understanding error types helps diagnose and fix model issues.
Custom Speech - Word Error Rate (WER):
| Error Type | Cause | Solution |
|---|---|---|
| Substitution | Wrong word | Add custom vocabulary (names, products) |
| Insertion | Extra words | Improve acoustic model |
| Deletion | Missed words | Address overlapping speakers |
⚠️ Exam Trap: High substitution errors → add custom product and people names to training data.
Selecting the Right Speech Approach
Use this decision tree to select between pre-built and custom speech solutions:
Written byAlvin Varughese
Founder•15 professional certifications