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In a previous pilot study these authors found evidence that cell phone exposure during an auditory task affected brain activity as measured by EEG. They measured event-related potentials (ERPs) on EEG and found that in response to auditory stimuli there was a decrease in the amplitude and latency of a sensory component (N100) and an increase in the latency of a later more cognitive component (P300) during active exposure. In the current study the authors tested a much larger group of volunteers (120 rather than 12), and also improved the study design by ensuring double-blinding, and improving dosimetry. The volunteers performed an auditory and a visual task, while receiving RFR exposure or sham exposure. The RFR was from a cell phone set mounted over the temporal region, and was given for 30 minutes at a frequency of 895 MHz at an average power of 250 mW, pulse modulated at 217 Hz, average SAR 0.11 W/kg. The order of RFR and sham exposure was counterbalanced and used a crossover design with the two sessions 1 week apart. Brain activity was recorded on EEG. There was no significant difference between the RFR exposure and sham exposure on the brain activity as measured by EEG.
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