Distance (m) | Noise Level (dB) | |||
Point North | Point South | Point East | Point West | |
1 | 95 | 81 | 80 | 81 |
2 | 91 | 79 | 77 | 77 |
3 | 86 | 76 | 75 | 74 |
4 | 83 | 74 | 73 | 72 |