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Appendix E. Signal Loss for Obstacle Types
| Obstruction | Additional Loss (dB) | Effective Range |
|---|---|---|
| Open space | 0 | 100% |
| Window (nonmetallic tint) | 3 | 70% |
| Window (metallic tint) | 58 | 50% |
| Light wall (drywall) | 58 | 50% |
| Medium wall (wood) | 10 | 30% |
| Heavy wall (15 cm solid core) | 1520 | 15% |
| Very heavy wall (30 cm solid core) | 2025 | 10% |
| Floor/ceiling (solid core) | 1520 | 15% |
| Floor/ceiling (heavy solid core) | 2025 | 10% |
