the "voice to skull I believe is a nano chip system and magnetic flux program fields. Over time you can kick it out to a degree.

i use medication, and external methods. 1st you push the sound vibration energy out of your mind by viusualizing the pathways in your brain, left side push left, right side push right. until you can plug your ears and only hear them in the ear.

then buy charcoal screen, aluminum foil, silver and copper wire and download a "gauss meter" on your android phone. Find areas of .7 or higher and place thick diverse blocks.
to guage the external chemical blocks, look up the molecule for clozapine, a dangerous medication but largely effective, zinc pyrithione shampoo is close and something i use that helps when applied in the right spots. I found 5 spots to cover in my home with high gauss, and since the attacks have been minimized.