According to the source, an active noise cancellation system has appeared in the Tesla Model S and Model X electric vehicles. It is implemented in a new version of the proprietary firmware number 2021.44.5.

The system relies on microphones integrated into the seats to operate. The principle of operation is the same as in headphones with active noise cancellation: the microphone picks up external noise, and the standard audio system reproduces the audio signal in antiphase. The overall effect of superimposing one audio signal on top of another is silence. But this is in ideal conditions. According to the reviews of drivers who have already managed to test the function, the noise in the cabin is really getting less, but the effect of active noise cancellation can hardly be called obvious. By the way, the official description of the function refers to "reducing the low-frequency road noise that occurs when driving on uneven roads." So when driving on the highway, this function may not have any effect at all.

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