| Up | Horizontal | With 2D | Down | With 2D |
One air space | 0.36 | 0.60 | 0.55 | 0.77 | 0.64 |
Two air spaces | 0.77 | 0.87 | 0.83 | 0.87 | 0.79 |
Three air spaces | 0.91 | 0.91 | 0.88 | 0.90 | 0.85 |