Active system for reducing exhaust noise
The principle is similar to the one that is used to suppress noise in headphones, only microphones and speakers used in automobile exhaust systems should be more powerful and able to withstand intensive heat and aggressive medium of the automobile exhaust. Active sound jamming systems can also be used to change the sound of a car engine, making a small engine sound more powerful or the sound of a diesel engine, like the sound of a gasoline engine.
