Is this true? (mind control/brainwashing related)?

[Cindy L]

My friend was telling me how our brains work on frequencies or what not. He said that these frequencies can be manipulated. He said you can bring someones frequency down / specific level and they will become much more susceptible. I have no comment, but would love to know what you people think. He also told me that NLP experts can hide commands/suggestions in there sentences for your sub C to pick up with out speaking weird