Yes we have the same problem with motorcycles when we are at the track.
The track owner have on him strict requirements on max dB of noise our motorcycles are allowed to make.
The track is of course in a fixed location but the dB measurements reading varying with the air pressure. So the denser the air pressure is the easier the sound propagate through air.
The track owner have on him strict requirements on max dB of noise our motorcycles are allowed to make.
The track is of course in a fixed location but the dB measurements reading varying with the air pressure. So the denser the air pressure is the easier the sound propagate through air.