Sound Levels
Explanation of Codes Table
Environmental Conditions /
Background Noise
| 1. Very quiet to below average | < 50 dB |
| 2. Average noise | 51 - 60 dB |
| 3. Above average noise | 61 - 80 dB |
| 4. Very noisy | 81 - 100 dB |
| 5. Excessively noisy | > 100 dB |
Examples of Environmental Conditions
Background Noise
| An empty classroom, no A/C | 50 dB |
| Classroom with A/C on | 51 - 60 dB |
| Restaurant | 61 - 80 dB |
| Playground at recess | 81 - 100 dB |
| Noisy cafeteria | > 100 dB |
