The audio is out of sync on that video, it isn't a sonic effect. You can hear sounds of the oncoming cars seconds before they actually pass the vehicle.
The sonic/doppler effect would actually be opposite of what the video implies, as the faster an object moves towards you, the closer the sound will "appear" to the source and be more sudden instead of propagating further ahead.
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Last edited by BlackArcher101; 09-05-2012 at 09:33 PM.
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