If you've never experienced noise-cancellation headphones, you should definitely at some point go to your local electronics store to try them out sometime. They're an amazing technology that has grown immensely in popularity over the years.
With that said, it was only a matter of time before noise-cancellation technology would be introduced to the automotive industry. And what better time now that EVs have introduced us to more unwanted sound due to lack of an internal combustion engine to drown out the noises.
How Noise-Cancellation Works
Noise-cancellation technology works by listening to the sound around the vehicle. The technology analyzes the sound waves being produced. Sound waves are made up of peaks and valleys. When noise-cancellation technology detects sound waves, the tech creates a new waveform that is the total opposite of that sound.
So, for every valley (in the sound wave), the noise-cancellation technology creates a peak. And for every peak, it creates a valley. This results in the sound waves canceling each other out. (See the graphic below to see what this looks like)