My research indicated that the most logical explanation was a secret technology called "V2K."
But recent events have caused me to question that.
I thought that whoever was using V2K on me was using my cell phone to track me and that's why I could still hear voices when I went out. Well tonight I went out to the store, and my iPhone didn't have any battery power so it was off.
But I still heard the voices.
(However I did notice that they weren't as loud as before, and there were also people who seemed to be following me. Nevertheless, I was surprised to hear voices since I couldn't be tracked through my iPhone.)
And earlier in the day I had watched the "smile" PV again. I noticed that it had black shadowy figures stalking around and causing trouble because no one could see them.
Similar things are seen in the music video to V.I.P.
No one may believe this, but there are things in SID's music videos that have to do with a weird game that I've been playing with them, which also has a sort of live action role-playing element to it.
I think that these black figures may represent those beings who I can hear in my head but cannot see.
When I was doing google search about hearing voices, I came upon several explanations.
Schizophrenia, V2K, and beings called "Jinn," were among the things I found.
Here is a Youtube video of one of these "Jinn" that was purportedly caught on camera. It looks similar to those black shadowy figures I mentioned in SID's music videos.