Acoustics of Room and Reverberation Time
| Acoustics | Reverberation Time in Seconds |
| Very very bad | Above 5 seconds |
| Very bad | 3 – 5 Seconds |
| Fairly good | 2 – 3 seconds |
| Good | 0.5 – 2 seconds |
| Very good | 0.5 – 1.5 seconds |
Civil Engg, Building, Road, Construction Ideas & Guides
| Acoustics | Reverberation Time in Seconds |
| Very very bad | Above 5 seconds |
| Very bad | 3 – 5 Seconds |
| Fairly good | 2 – 3 seconds |
| Good | 0.5 – 2 seconds |
| Very good | 0.5 – 1.5 seconds |