I have noticed something and I wanted to check if anyone has experienced the same, before I contact Tesla Service. First of all the Tesla Model S is super silent, though when I drive above 67mph, there is a noise that starts building insight the car. It does not seem to come from the "motor". My model S is 85KW. The A/c was off and no music was playing. All windows closed including sun roof. I had tested a Model S 85P and did not hear the noise. I have recorded a video while I was on the highway. If you listen it through an "iphone" speaker, you will not hear it, because the speakers are too weak and don't carry a good base. Please let me know what you think.