This question about Aspartame cites a source which states that ELF, extra low frequency wave transmission, can be used to induce emotions, feelings or hallucinations.
I did a quick Google search, and found a plethora of sources which state that ELF signals can be used for various things reaching from mind control to mood altering:
Using these frequencies, the nerve fibers convey pain sensations, the feeling of hungry, tiredness, nausea, and signals on the sense of balance to points in the brain which invoke these stages in a awake consciousness.
If interference signals are superimposed on the natural signals generated by the body as a carrier, the brain could be presented with stimulated states that we consciously perceive, but which do not appear as reality.
There is evidence that ELF magnetic waves can affect brain waves. This set of experiments was designed to study the effects of ELF rotating magnetic fields on the brain.
Our brains are extremely vulnerable to any technology which sends out ELF waves, because they immediately start resonating to the outside signal by a kind of tuning-fork effect. Puharich experimented discovering that
A) 7.83 Hz (earth's pulse rate) made a person feel good, producing an altered-state.
B) 10.80 Hz causes riotious behaviour and
C) 6.6 Hz causes depression.
However, the credibility of these sources ranges somewhere between fairly low and total quackery.
My quackery radar is tingling, but I'd still be interested to know if there is a chance that this might have some scientific background.
Is there any kind of scientific evidence for ELF waves having any effect on mood/mental state of subjected persons?