With climate control off, music off, I would think the car should be absolutely quiet. But I hear this strange sound from the bottom part of the front of the car that sounds like a jet engine in a very far away distance. The sound is not loud, you wouldn't hear it if you were outside in a noisy environment. But I can hear if faintly inside the car when I drive, and I can hear it when I'm outside the car. I hear this sound soon as I turn the car on (depress brake pedal) or when I plug it in to charge, I hear this sound for about 5 minutes and then this sound goes away. But the sound remains consistent when I'm driving. The sound is so quiet, the first time I heard it, I thought someone outside my closed garage door, maybe 100 meters distance was using a leaf blower. But when I heard the same sound at say 1 AM, and I set my ear to the front portion of the car, I realized it's actually coming from the car. Anyone know what this sound is?