0
because the noise gets louder and louder and it can damage your hearing
Buy a exhaust with a larger circumference, the larger the circumference, the louder the noise.
the humming noise is coming from a bad ground on you stereo
Diesel trains are louder than electric trains because you the noise that the diesel engine makes, which is louder than the electric engine.
Well i guess the noise starts getting louder and louder as the train is coming?