Electromagnetic bioinformation in the frequency region between 100 Hz and 100 kHz?

A highly sensitive measurement amplifier (BIT device) was constructed in or der to detect possible electromagnetic biosignals in the frequency region b etween 100 Nz and 100 kHz. Even when working with the highest amplification mode of the BIT device, no endogenous electromagnetic biosignals could be detected on the test persons, but only well-known EMG signals. If the BIT d evice worked in a feedback mode, electromagnetic oscillations beween 1.7 an d 2.9 kHz could be generated and oscilloscopically detected; these oscillat ions are caused by the oscillator system 'BIT - man', depending on the impe dance of the human body. Biological effects of the impedance-depending osci llations were investigated in a simple randomized double-blind study. Three anamnestically healthy persons were treated 20 times with their specific o scillations. The physiological effects of this treatment were measured by p ulse plethysmography. Nonlinear analysis of the time series indicated signi ficant changes in pulse dynamics of one person. Linear analysis of heart ra te variability showed no statistical significance. Our device was only desi gned for the project described below. It is, therefore, evident that the re search results presented in this paper cannot be applied to any of the ther apy devices at present on the market.