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32                                               2 Program concepts


            2.2.4.4  Passenger airport
            Distance to point of takeoff approx. 3 km, in extension of the airstrip. L1 and
            L5  are  defined  exclusively  by  aircraft  noise.  Level  L1  is  at  the  limit  of
            determinability. A quantifiable confidence interval for L1 of approx. 1 dB(A)
            would only be gained from the total of 5 days of measuring.
            Fig. 2.4:   Passenger airport
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