POSIZIONE: PAF > Vibrazioni Corpo Intero > Esposizione
logo regione toscana
Regione Toscana
Diritti Valori Innovazione Sostenibilità
collegamento sito usl 7 siena Servizio Sanitario

WBV - Calculating the level of exposure



Perform online calculation


Calculating the level of exposure


The current legislation prescribes that the level of exposure to vibration is assessed by the calculation of the frequency-weighted equivalent acceleration value over an eight-hour reference period. This can be calculated by using the following formula:




Te :         Total daily duration of exposure to the vibration (hours)

avmax    Highest of the three orthogonal axes acceleration values:



awmax(m/s2) = MAX( 1,4 awx ; 1,4 awy ; awz )


If the worker is exposed to different vibration values, as in the case of  the usage of several machines throughout the working day, the daily vibration exposure A(8) expressed as m/s2, will be calculated as follows:



a2maxi : frequency-weighted acceleration for the i-th operation

Ti: Exposure duration for the i-th operation (hours)






LOADING TIME: 0.011 s.