chapter  5
12 Pages

Calculating noise doses and limits

Here, L1, L2 are the various levels to which the employee is exposed during

different periods; t1, t2 are the corresponding exposure times.

The number 8 in the denominator represents an assumed working day of 8 h.

This standard working day is used irrespective of how many hours the employee

actually works. It assumes that all time periods are measured in hours. If for some

reason it is decided to measure all times in minutes, then the 8 must be replaced by

480, the number of minutes in 8 h.