Differences between peak noise levels in the cab of heavy all-terrain vehicles depending on vehicle model by surface
| Vehicle model | I | II | III | IV | V | |||||
| Surface type | pr | or | pr | or | pr | or | pr | or | pr | or |
| I | ||||||||||
| pr | ||||||||||
| or | – | |||||||||
| II | ||||||||||
| pr | ns | – | ||||||||
| or | – | 0.002 | – | |||||||
| III | ||||||||||
| pr | 0.0001 | – | 0.0001 | – | ||||||
| or | – | ns | – | 0.006 | – | |||||
| IV | ||||||||||
| pr | 0.0001 | 0.0001 | – | 0.02 | – | |||||
| or | – | 0.0001 | – | ns | – | ns | – | |||
| V | ||||||||||
| pr | 0.0001 | 0.0001 | – | ns | – | 0.03 | – | |||
| or | – | 0.001 | – | ns | – | 0.03 | – | ns | – | |
I, DAF 4440; II, MAN 4610; III, MAN 4620; IV, MAN 4640; V, MB Unimog 1300; ns, statistically non-significant; o-r, off-road; pr, paved road.