Leq-Calculator
Conversion of Individual Sound Levels into Leq
Sound pressure / Distance Calculator

Number LASmax dBA Duration sec




       Event duration in sec

In our calculation, the noise curve of each event is approximated by a triangle.
Only the red area is used for calculation.
(Noise which is not less than LASmax - 10 dBA)
 
10 events with a maximum level of 70 dBA and an event duration of 90 sec (related to a base-level of 30 dBA) will result in the following average sound indicators if averaged for certain given periods of time:

Period of time Leq3 [dBA] Leq4 [dBA]
1 hour 53.9 54.0
8 hours = 1 night 44.9 42.0
1 day 40.1 35.6
1 month 25.3 16.0
6 months =
averaging time defined by Law Against Aircraft Noise
17.5 5.6



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