Google:- Google home is using machine learning to remove all type of back noise like traffic, air, and others so the call experience goes smoother.

Microsoft:- In Skype we are using machine learning to catch all type of back noise and mix it with your voice. Skype will try every possible way to make your call experience as bad as possible. Every type of noise Trafic, Air, hardware, your breath if there is nothing! the software will cut your voice and send only a few parts.