vibrating noise after doing the mantra to open the crown chakra

I have a question of whether I'm doing well or not, after repeatedly vibrate the mantra to open the crown chakra listen for 20 or 30 seconds a kind of vibration noise that resembles the sound of a car engine to many revolutions, also note instead of the crown chakra located notice an energy that covers my whole head from the forehead to the nape

HAIL SATAN! HAIL ASTAROTH!