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The physiological effect of low-frequency noise and vibration peak amplitudes on a body are indicated in the diagram below:

| Vibration Level - Acceleration (m/s2) |
Human Perception |
| < 0.315 | Not uncomfortable |
| 0.315 - 0.63 | A little uncomfortable |
| 0.5 - 1 | Fairly uncomfortable |
| 0.8 - 1.6 | Uncomfortable |
| 1.25 - 2.5 | Very uncomfortable |
| > 2 | Extremely uncomfortable |
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