– Range 1: noise events from 30 dB(A) to 40 dB(A). Increase of primary
sleep disturbances.
– Range 2: noise events from 40 dB(A) to 55 dB(A). Sharp increase
in adverse health effects in a large part of the exposed
population.
– Range 3: noise events above 55 dB(A). Adverse health effects
occur frequently.