30 young and healthy male volunteers were tested on nine study days, on which they were exposed to three different exposure conditions: 1) exposure to TETRA electromagnetic field with an SAR of 1.5 W/kg, 2) exposure to a TETRA field with 6 W/kg or 3) sham exposure.
antenna and TETRA signal were designed to simulate actual exposure of a TETRA hand-set; radio frequency background fields (broadband 100 kHz to 3 GHz) in the shielded exposure room were below 0.2 V/m, and low frequency electric and magnetic fields from power lines (50 Hz) were 2.1 V/m and max. 320 nT
|SAR||1.5 W/kg||maximum||measured and calculated||10 g||-|
|SAR||6 W/kg||maximum||measured and calculated||10 g||-|
The mood and well-being were not impaired in both exposure groups compared to the sham exposure group and there were no subjective complaints.
In the working memory tests, group 2 (SAR 6 W/kg) showed a significantly lower number of correct reactions in the 1-back task compared to group 1 and the sham exposure group. In the 2-back task, the reaction time was significantly enhanced in both exposure groups compared to the sham exposure group.
The authors conclude that the results give no indications for negative effects of exposure of young men to a 385 MHz electromagnetic field (TETRA) on cognitive functions or well-being.