This article admits injecting sound into a person’s brain and calls it Voice To Skull, a term that has been discredited in more recent times by the same media that admits it almost fifty years ago.
Voice to Skull technology uses electromagnetic microwave pulses to transmit sound. The sound can be audible or like silent thoughts, which is more accurately termed synthetic telepathy. This technology is far more advanced now. People can be convinced that the transmissions are their own thoughts when there is no detectable volume and the thought seems like one’s inner voice.
The capacity to brainwash, condition and ultimately program an individual’s personality and behavior without their awareness goes back at least a half century. Its use is pervasive.
American Psychologist article: 1973 Voice to Skull Demonstration
New York Times Article: C.I.A. Data Show 14‐Year Project On Controlling Human Behavior