During driving, the car cockpit faces a complex sound environment. Road noise/wind noise/horn sounds from outside the vehicle, as well as noise from the air conditioning/music/voices inside, can all interfere with the microphone's sound pickup for calls and voice interaction, leading to unclear calls and low voice recognition rates. The ECNR voice pre-processing algorithm utilizes microphone array technology to achieve intelligent noise reduction and echo cancellation, extracting clean speech to provide users with a first-class in-cabin interaction experience.