I've directly seen evidence that some people can 'hear' non-acoustic
(radio) energy.
Around 1988 a woman came into the Museum of Science in Boston to track
down
a noise she heard "inside" her head during a public physics demonstration
in years past.
She was currently suffering from unexplained loud noises in her head while
at home, as well as headaches, loss of sleep, etc. She remembered
experiencing something many years ago at the Museum of Science which had
produced the same effect. Thus she hoped to get clues as to what might be
plaguing her.
I was the head of the museum electronics department at the time. During
conversation she described a physics demonstration in the Cahner's science
theater which probably involved a tabletop VandeGraaff generator and other
high-voltage devices. Along with Mike A. from theaters/demonstrations, I
tried a number of devices to find out if she could "hear" them.
The offending energy sources turned out to be tabletop vacuum-tube tesla
coils, as well as a large tesla coil "plasma sphere" and a plasma tube art
object from artist Bill Parker called "Quiet Lightning;" a device driven
by a HF linear amateur radio amplifier (it put out several hundred watts
at around 3Mhz or so, if I recall correctly.)
All of these devices are silent, yet she could not tolerate the "noise" of
being anywhere near them. For example, she had to stay about 15ft away
from a tabletop vacuum tube tesla coil in order to avoid pain in her head.
We tried a double-blind test with the plasma spheres, and she still
responded strongly to them even when they were hidden on the other side of
a solid wall and none of us knew that they had been activated. In fact,
she had to move far away from the wall, or the pain/noise she reported was
intolerable. She described the effect as coming from inside her head, and
as being different from normal sound.
It turned out that she was living in Framingham Mass., which I knew has a
large Raytheon military communications experiment facility. If any town
in Massachusetts is close to weird radio transmitters of all varieties,
Framingham is the place. I recommended that she try shielding her bedroom
with foam insulation panels which are covered with aluminum foil. This
would block high frequency radio waves, though it wouldn't stop VLF/ELF
frequencies. (I also told her to try an experiment: put a metal bucket on
her head to see if it stopped the 'noise', but I don't know if she ever
did this!)
It was interesting that her teenage daughter had the same apparent
EM-detecting
ability, although not the pain and headaches. The daughter reported that,
as a child, she could sense any active television set at a distance and
through walls. When outside a house, she could sense an operating TV set
in the house, and had found that her playmates could not do this.
The scanning coils in television sets emit strong magnetic spike signals
at 60Hz and 15.8KHz, as well as high voltage spike signals at 15.8KHz.
Any wideband radio receiver should be able to sense a nearby TV in
operation. The daughter's comments seem to be evidence that human
RF-hearing ability is genetic rather than caused by things like amalgam
dental fillings behaving as an accidental semiconducting rectifier.
Years later I read some recent research where iron particles were
discovered to occur naturally in the human sphenoid bones, as well as
microscopic bio-iron crystals in human brain tissue. Are human beings
natural radio receivers? It would make sense if mammals have a compass in
their brains to aid navigation. A microscopic compass can malfunction: it
can be violently wiggled by radio waves, and perhaps this was the cause of
the woman's troubles.
PS
To anyone who suffers the same mysterious pain and noise as the woman
above: first, verify that it's not sound (check whether it can be blocked
by plugging your ears.) If not, then see if you can stop the noise with
metal shielding. In other words, put a small television set inside a
closed metal box and see if you can still "hear" the strange signals. Or
...put a bucket on your head. Seriously! Find a clean metal wastebasket,
or cover a small cardboard box with aluminum foil. If placing this metal
object over your head can reduce or stop the signals, then it strongly
suggests that they ARE radio signals and not something else. It also
means that you can make any room into a "radio quiet room" by covering the
walls and ceiling with metal foil. A house might already by radio-quiet
if it includes foil-covered foam panels as thermal insulation inside the
walls.
Note that this thin foil shielding can only block high frequency signals
such as AM/FM/Television and above. Low frequencies far below the AM
radio band (called VLF or ELF) will go right through aluminum foil. In
that case you'd need thick slabs of solid copper in order to block the
radio waves.
.