Because of the type of engine, and how the exhaust is made. If take away the silencer on the exhaust pipe, you will get a whole different sound. And If the engine has for example a four cylindre, it will make a nicer, and not so deep sound. With a 8 cylindre engine , it will make a more dark and "groggy" sound.
to decrease exhaust noise
Noise pollutants are noises in an are that doesn't normally have much noise e.g. Drilling on the road, beeping from cars
To make a spitting noise. Often cars do this
cars tend too
It means you don't have your seat belt on all cars do that!!
Yes. In some cars it does.
One type of noise pollution in the neighborhood would include loud music. Another type of noise pollution would be loud cars.
Dogs make howling noises in cars.
underground
there not no power or noise
it controls the fuel injection part of some cars
the noise pollution guidlines apply for all vehicles including sports cars as well as big rigs and other large vehicles. sports cars may be allowed to be a little bit louder in the eyes of authority and guidlines.