Health Effects of
Electromagnetic Radiation
Cordless Phones Health Risks
Blue Tube Headset
Cell Phone Tower Radiation
Unmodulated radio waves are relatively safe
It has been known since the work of Suzanne Bawin and her
co-workers in the mid 1970s that pure low power radio waves,
of strengths similar to those used by cell phones, are
relatively harmless. Pretty much the only damage that can be
done by an unmodulated signal is due to the heating effect
of the radiation as it passes through the body, and the
ICNIRP safety guidelines adopted by many governments are
more than adequate to protect you against that.
Modulated radio waves are not safe
Bawin et al. also showed that the situation changes
drastically when the signal is “amplitude modulated” so that
its strength rises and falls in time with a lower frequency.
In particular, they found that signals that were far too
weak to generate significant heat, could now drive
structurally important calcium from the surfaces of brain
cells. Other work showed that pulses with very sharp rise
and fall times were even more effective. The loss of this
calcium weakens the membrane and makes it more likely to
leak and gives unwanted biological effects.
Cell phone signals are modulated
Cell phone signals have to be “modulated” if they are to
carry information such as speech and the various control
signals needed to make the system work. Most digital
modulation systems involve sharp changes in signal strength.
These occur over a wide range of frequencies, some of which
are biologically active. Furthermore, they occur at
radiation levels many orders of magnitude lower than those
specified by the ICNIRP guidelines. These guidelines are
therefore set far too high to protect us from modulated
radiation.
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