How it can be that people react sensitively to electromagnetic radiation which in strength is below the legal safety standards is still a mystery for science. The current scientific paradigm is that only strong electromagnetic fields can have an effect on humans, animals and the environment. A study by a German university of the migratory behaviour of robins shows that weak electromagnetic fields can have an influence too. This study could have implications for the way in which the effects and potential dangers of electromagnetic fields are assessed.
"Migratory birds confused by weak radio waves." With this headline Dutch newspaper, de Volkskrant, opened an article on the migratory behaviour of birds on May, 8.  Henrik Mourits of the University of Oldenburg in Germany, has studied the migratory behaviour of robins for years and found that their internal compass is disrupted by weak radio signals from the medium wave (AM). This finding does not fit within the scientific theory accepted to date. The current paradigm is that weak electromagnetic fields are not strong enough to affect humans, animals and the environment. This is because it is based on the so-called toxicology/dose-response model which states that the higher the dose of electromagnetic radiation, the greater the effect it can have. However, more and more researchers, including Henrik Mourits, believe that weak electromagnetic fields can also affect humans, animals and the environment.
Weak electromagnetic fields are very weak emissions of energy coming from sources as household appliances, radio waves, cell phones, wifi and cell towers. If it turns out that these can indeed affect biological systems, this will have implications for the way in which the effects and dangers of electromagnetic radiation are interpreted presently. It may also be an answer to the question why people can have health complaints when exposed to a dose of electromagnetic radiation which is still far below the legal safety limits.
The Australian researcher Adey already argued that weak electromagnetic fields could have a biological effect. During the examination of brain cells from chicks he discovered the principle of "biological windows” . He discovered that biological systems, including cells, only accept stimuli if they have a certain wavelength (frequency) ánd the intensity is above a certain minimum and below a certain maximum. There is no response to stimuli that “can’t go through the window”. Thus, it may occur that a potent stimulus has no effect at all, while a very weak stimulus which however has the same wavelength, does. The existence of such windows as a form of protection of nature against overstimulation is not inconceivable, when taking into account that we live in an electromagnetic ocean of natural and technological radiation.
Another plausible explanation for the influence of weak electromagnetic fields on biological systems could lie in the fact that people are electromagnetic beings too. Our organs and brains have their own electromagnetic fields. And although the proposition that we are electromagnetic beings still remains outside the current scientific paradigm, it is the starting point however from which ECG, EEG and MRI scans work. The electromagnetic field of our heart and our brains is much weaker than that of the geomagnetic field and this, in turn, is much weaker than all electromagnetic fields created technically. So if you start from the model of dose dependency, it is therefore not inconceivable that weak electromagnetic fields could have an effect too; these are in fact a lot stronger than the electromagnetic fields of the body.