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Seat Vibration and Driver Drowsiness (Low Frequency Vibration (Reduction…
Seat Vibration and Driver Drowsiness
Low Frequency Vibration
Light Shaking
General discomfort
Negative prolonged exposure
Disturbances in driver performance
Vehicle disturbances to steering and brake controls
Harder vibrations
Usually undesirable sound
Stress stimulus
Acute blood pressure elevation
Cause microsleeps
Reduction in Alertness
Reduction in beta waves
Increase in theta waves
Intermittent/Random Vibrations
Stimulating
Waking affect
Body doesn't get used to it
Creates Alertness
Reduces drowsiness
Doesn't eliminate drowsiness
General Health
Micro fractures in the vertebrae
Body metabolism and chemistry effects
Decreases metabolism
No definitive research to determine exposure limits
Whole body vibration not cited in Aus OH&S regs.
Back neck and shoulder pain
Nerve damage
Disc Protrusion
Discomfort
High Frequency Vibration
generally reduce drowsiness
Softer vibrations
Transient high freq vibes still cause drowsiness
Current Seat design
transfer vibrations to the body
Not enough quantitative data to reduce vibration in designs
Increases fatigue