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 ...

The typical gasoline-powered motorcycle generates motorcycle noises equivalent to a chainsaw or a jackhammer at volumes reaching 80-100 dB. The noise level of electric motorcycles reaches between ...