Overflight duration in sec
In our calculation, the noise curve of each overflight is approximated by a triangle.
Only the red area is used for calculation.
(Noise which is not less than LASmax - 10 dBA) |
|
10 overflights with a maximum level of 80 dBA and an overflight duration of 90 sec (related to a base-level of 40 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 |
63.9 |
64.0 |
| 8 hours = 1 night |
54.9 |
52.0 |
| 1 day |
50.1 |
45.6 |
| 1 month |
35.3 |
26.0 |
6 months =
averaging time defined by Law Against Aircraft Noise |
27.6 |
15.6 |
|