active noise cancellation

[JudgeM]

I work in a company that does noise cancellation systems for air planes.

You can't buy an off the shelf system for any car, also noise cancellation is done best near your ear hence noise cancelling headphones.

Some auto manufcaturers like Honda and GM have built in noise cancellation in the cabin, but they have to be specially designed and tuned to the properties of the cabin.

No the canceling waves cannot damage your ears.