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Foreign media reported that Andrew Krok of Roadshow saw a Tesla Model S at Harman Audio Manufacturing Company's R & D center in Novi, Michigan, USA. The car is equipped with speakers in many parts of the body. The R & D center personnel are testing the sound system. It is understood that Harman is building a system that enables electric vehicles to make the sound of internal combustion engine driving. The system can remind passers-by, especially blind people, and vehicles in time. Judging the approximate position and distance from the sound, so as to make a correct judgment.

Andrew Krok said that from a live demonstration of the sound system conducted by the developers, it can be seen that the sound effect sounds realistic. As the test car Tesla Model S speeds up, it will sound like the sound of a fuel car from any angle. Another audio demonstration showed that the audio system was very "futuristic" and the effect of matching with electric vehicles was very significant.

It is understood that the United States issued a new regulation on electric vehicles, requiring all pure electric vehicles and hybrid vehicles from September 2020 must be equipped with an external audio alarm system, Harman for electric vehicles sound system came into being.

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