Difference between revisions of "Human Vibration"

<math>D_k</math> is the acceleration dose. It is use to evaluate the effect of vibrations on the human spine, and calculated as the 6th root of the sum of the peaks in the acceleration signal raised at the 6th power. it is expressed in m/s². Peaks are defined as the absolute maximum of the acceleration signal between two zeros crossing. In the Z direction, only the positive peak will be considered, were all positive and negative peaks are used for the X and Y directions. <br>

Specific filters are used to weight the acceleration signal before calculating the <math>D_k</math>. These filter are different for the vertical and horizontal direction, and are defined for a sampling rate of 160 Sample/second. Therefore, we advise to [[NVGate Recorder|record]] the signal with a low [[NVGate_Front_End#Input_settings|sampling rate]] in NVGate.<br>

Assessing the affect of the vibration on human spine most is important when dealing with transportation vehicular, especially from driver seat. for a better evaluation, the ISO 2631-5 advise to calculate the daily acceleration dose, defined as : <br>