Distance between exposed object and exposure source
1 cm
Setup
Three different analogue 900 MHzNMT phones were used with either a helix, fixed whip, or extended whip antenna as well as two digital phones operating at 900 MHz (GSM) and at 1800 MHz (PCN), respectively. The phones were operated via a computer and without sound transmission (single-blind). The phones which were not held by the test persons were located 1 ± 0.5 cm from the head while the subjects were seated in a comfortable chair.
Additional info
Five exposure trials of 30 min were performed each with 20 min of RFexposure and 5 min of sham exposure before and after the real exposure. Apart from this there was a separate 30 min sham exposure trial. The order of different exposure conditions was randomised. Only one test per day was done for each subject.
Harma M
(2000):
Electric hypersensitivity and neurophysiological effects of cellular phones--facts or needless anxiety?.
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