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RANGES


MAXIMUM RANGES IN METERS DEPENDING ON AREAS, FOR AUDIBLE WARNINGS
DECIBELS at 1 m of transceiver 115 110 105 100 95 90 85 80 75
Quiet areas without noise, wind and obstacles (sea, country). 300 250 200 150 100 60 50 40 30
Areas with noise of ~ 70 dB (at city street). 100 80 65 45 30 18 15 12 8
Crowded areas and high noise level (stadiums). 30 25 20 15 10 7 5 4 3