Perception Intensity of Lying Humans
The effects of oscillation on lying humans is of special interest in long distance trucks with sleeping cabins or in ambulances and rescue cars. A huge number of test results already available point to the fact that, since oscillations have a direct effect on the head, the emerging accelerations here can be applied as a measure for the stress related to oscillation of lying humans without weightage.The curves of equal perception intensity for lying humans prescribed in the VDI specification 2057 are given in the figure.
The frequency range is also divided into three ranges for exposure perpendicular to the direction of the spinal chord.