I don't know anything about the car noise cancellation tech, but I would hazard a guess that instead of using microphones to pick up noises and generate counter

I don't know anything about the car noise cancellation tech, but I would hazard a guess that instead of using microphones to pick up noises and generate counter-noises in real time, car manufacturers can just create the right anti-noise for their engine sounds, for the sounds of wind hitting the car body, etc. and use them without needing anything particularly clever going on?