There is no technical term such as ' human "electrical frequency" ' ,
however, if we want to find some meaning to it, we may consider
EEG and EKG waves, emg waves which are produced inside the body and
can be measured outside.
EEG shows the electrical activity of neurons in the brain.
EKG show what the heart is doing.
The spectrum (showing which frequencies are present) is given here in
Fig 1a. (see the peaks at 5 Hz and 15 Hz)
Different peaks have names ( alfa, beta ..) and their intensity changes with
activity (sleep, meditation,...)
or disease (epilepsy)
Epileptic fit can be induced by outside stimuli - not by electric wave -
but by the light flashes (of course, light is an emg wave - but that's
not that you are asking, I think)
The reason why electromagnetic field (= emg) does not affect inside
function of neurons, why it does not affect their electric signalling,
is as follow:
Human body is conductive. Dry skin is not a good conductor - but inside the skin
people are 'wet' and water solutions are conductive. This conductive layer
forms a Faraday cage - a shield which does not allow the emg waves to penetrate
Naturally, that depends on frequency and intesity : High frequency
and intensity may pass through (e.g. X rays).
Higher frequency (20kH to GHz) (radio frequencies) have less and less
biological effect (expect for heating if intensity is very high (such
as in the microwave oven)
Very High frequencies (UV, X ray, gamma rays) may be dangerous.
The full emg spectrum is shown here
For example, UV light exposure can cause cancer of the skin (is genotoxic).
The reason why scientists are confident about where the boundary between harmles
and dangerous radiation is, can be deduced from the Quantum Mechanics: Photon
(a particle of emg radiation) has to have certain minimal energy (frequency) to
be able to break a chemical bond. That minimal frequency starts at UV. Microwave
radiation (used by cell phones) is softer and cannot change biomolecules.
Technical explanation is here:
In spite of the expert consensus that biological effects of waves
from cell phones, high voltage power lines, ... are negligeable, there
is substantial lay literature asserting the opposite:
This example, (which looks impressive) asserts 'Genotoxicity':
Substances that damage cellular genetic material, such as DNA and
chromosomes, are called "genotoxic".
Common sense rebutal to these persistent alegation is this:
AC electricity came to widespread use during 1850 -1920 . Since that time most
people live in a 50Hz (or 60Hz) emg radiation bath from the household wiring.
No significant ill-effects have been observed so far. There have been
many claims of that, but no evidence.