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To test whether exposure to an active mobile phone affects EEG as a function of time.
|ばく露時間||continuous for 3 x 20 min|
|Pulse width||0.577 ms|
|Repetition frequency||217 Hz|
Spoken extracts from a radio play (not audible to the subject) were played to the sending phone via a CD player at approximately 80 dB SPL (peak level).
|Distance between exposed object and exposure source||5 cm|
|ばく露装置の詳細||The mobile phone was positioned 5 cm radial to the subject's scalp midway between Oz and Pz, using a non-metallic external bracket. The phone was removed and switched on or off outside of the recording room before the start of each condition. The purported EMF attenuator (Q Link Ally) was positioned over the subject's chest (left sternum) using a comfortable chest-strap and was operated from a separate room.|
|Additional information||A 20 min series of tasks were performed 3 times, each with one of the 3 following (counterbalanced and single-blind) exposure conditions: exposure to an active mobile phone (MP) concurrent exposure to an active MP and a purported EMF attenuator both MP and EMF attenuator deactivated (control).|
Exposure to an active mobile phone affects neural functions in humans, altering both resting EEG patterns and the evoked neural response to auditory stimuli, with a number of these changes occuring as a function of exposure duration.