- Tutkijaliitto ry
- Oulun yliopisto
- Tampereen yliopisto / Yksiköt
- Lapin yliopisto / University of Lapland
- Lapland University Press / Lapin yliopistokustannus
- Itä-Suomen yliopisto
- Centria-ammattikorkeakoulu, Centria-kirjasto Kokkola
- Vaasan yliopisto
- Tampere University Press. TUP
- Viipurin Suomalainen Kirjallisuusseura
- Humanistinen ammattikorkeakoulu- Humak
- Tampereen teknillisen yliopiston julkaisut
SPONTANEOUS MOVEMENTS OF HANDS IN GRADIENTS OF WEAK VHF ELECTROMAGNETIC FIELDS, ACTA UNIVERSITATIS OULUENSIS C Technica 415The aims of the present study were to clarify the antenna function and radio frequency radiation(RFR) sensitivity of human subjects using theoretical calculations and field tests. The weak veryhigh frequency (VHF) electromagnetic fields and spontaneous hand movements were recorded.Groups of university students, other volunteers and as a very interesting group, experienced wellfinders, were used as test subjects. The VHF field was studied using a spectrum analyser andtuneable narrow-band or broad-band meter with a dipole antenna. The hand movements wereregistered by potentiometric systems and electromyography (EMG). The test subjects (altogethern=140) in different tests were walking, sitting in a cart being pulled slowly forward, or sitting ina moving car. The responses were observed and hand movements were recorded and analysed bypersonal computers. By visual inspection and using the Pearson's correlation, the results ofdifferent individuals have been compared with the measured intensity of far fields of a radio mast.Reaction spots and graphs defined by different individuals in the same experiment areas have beencompared to each other.\nHand movement correlated with the reactions of the forearm and shoulder muscles, e.g.,pronator teres and trapezius, by EMG measurements. The reactions of some persons correlatedwith each other. Experiments in a slow moving wagon and in a moving car showed a correlationbetween the test subjects’ hand movements and the intensity of below 1 mV/m radio and TVsignals measured in the vicinity of the test subject. In open field tests different persons usuallyreacted in widely different ways. The most evident results were recorded near the buildings, wherethe radio waves reflected from the wall and patterns of standing waves were clear. Many VHFfrequency modulated (FM) broadcasting signals were summed at these places at the same time.\nIt is concluded that the spontaneous hand movement reactions occurred as a response of thehuman body to the gradients of the VHF field intensity. The reaction generally occurred ininterference patterns of multipath propagation or standing waves originating from the radiation ofFM radio and TV broadcasting transmitters and radiation reflected from the walls of buildings orfrom other objects. This non-thermal reaction was clearly observable as spontaneous armmovements by 39 percent of the 85 tested students.
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- HUTTUNEN PAAVO