An hourly average of the Noise Level (HNL) including number of flights per hour N is also used and defined as: HNL = SENEL + 10 log 10 N - 35.6 (dB) A variation in the calculation ... is shown in the ...
Sound levels are measured on a scale known as the decibel \(dB\) scale. The higher the number the greater is the sound level. Too much noise can damage hearing. Exposure to 90 decibel sound levels ...
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