Lol, ok this is gonna sound silly..I actually emailed provape about this once...I think they thought I was crazy...if you keep your teeth on the drip tip while vaping and hear the high pitched noise....try using your lips only (yea yea, that's what she said).. I have provari v1 / v2 and mini and I hear it on all frequently.... I think I am sensitive to PWM.
Lips only and the noise goes away...I think teeth help vibrate the sound...
I dont have no teeth
Is that why I dont get any noise?