Huttunen P, Hänninen O, Myllylä R. FM-radio and TV tower signals can cause spontaneous hand movements near moving RF reflector. Pathophysiology. Mar 5, 2009 Ahead of print.
Background and Objective
Radiofrequency radiation has been studied intensively in the near GHz region. In the recent past, frequencies of FM-radio and TV signals have been much less studied. As there is evidence from human and animal studies that electromagnetic radiation has effects on the brain, the aim of the present study was to find out, if the motor responses are generated in sensitive persons when they move across a set of standing waves caused by radiation of a FM-radio and TV tower.
The wavelength of a 100 MHz radio wave is 3 metres. For testing human sensitivity to moving standing waves, a movable wall reflecting radio waves was constructed. The test place was 5 km from the FM radio tower. The test subject was standing back towards the reflector with the hand movement transducer in his hands. The RF-meter with horizontal 100 MHz dipole antenna was placed close behind the test subject. The RF meter and the hand movement transducer were constructed by the authors. At the start, the reflector was 2 metres from the subject’s back and it was moved 20 metres back and forth. When the reflector was moved, the position of the maximums of the standing waves changed and the electromagnetic intensity changed in the body of the standing test subject. The computer registered the signals of the hand movement transducer and the RF meter. A total of 29 adults of different ages participated in the experiment.
Results and Interpretation
In 9 subjects, hand movement graphs showed features similar to those on the RF meter graphs. In 6 subjects, changes in the hand movement graphs were obvious but did not correlated with changes on the RF meter graphs. For 14 subjects, they did not react or showed only small noise-like change in the graphs. The authors could not determine whether the reaction occurred in the limbs, muscles or in the brain. They believe it is possible that the change of intensity of standing radio waves causes a small change in the nerve-muscle permeability of the nerve signal. The authors note that it was not possible to exclude influences of electromagnetic radiations of other frequencies from other sources. Even though the experiment was conducted in a rural area, private hand held telephone signals could cause interferences to RF instruments.
The authors have concluded that sensitive persons seem to react to crossing standing waves of the FM-radio or TV broadcasting signals. The reactions were apparently initiated by radiofrequency radiation near reflecting objects, but they became more random in very weak variations of total field intensity. Individuals are different, and in natural situations many sources interfere with each other.