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Backgroundvalue Traffic Noise overlay
In the Wiki i find this note bij the overlay traffic Noise: “this overlay only shows the impact of traffic noise on top of a background value of 48 dB(A)”. In the MKP indicator geluidbelasting wegverkeer we use classes lower then 48 dB. How can i calculate with classes lower then 48 dB, when the Tygron engine use 48 dB as the minimum/background grid value?