EEG data of healthy normal individuals (n=12) were compared to those of cochlear deaf individuals (n=12), to investigate an induced electromagnetic effect that is independent from sound waves. First, EEG recordings were assessed at baseline (5 min with eyes closed and phone off) and then during 5 min conversation with the phone placed on the right ear.
For more details, see [Bardasano et al., 2005].
|Distance between exposed object and exposure source||2 cm|
|Chamber||Each subject was comfortably seated on a plastic chair inside a Faraday chamber.|
|Setup||The mobile phone was held by an insulated device over the right ear, 2 cm from the auricle to avoid thermal effects.|
|Additional info||The EEG of subjects, relaxed and with their eyes closed, was recorded while listening to a 5-min conversation, first with the mobile phone off (basal state) and then with the phone on.|
By comparing the EEG data of both groups, an increase in the amplitutes of alpha waves and theta waves, regardless of the sound waves, has been observed. This suggests an inductive direct non-thermal effect of the mobile phone signal on the brain.