Auditory brainstem response (ABR) was recorded first without a mobile phone at baseline, and then under real exposure and sham exposure in a counterbalanced order. During exposure/sham exposure, the mobile phone was placed directly on the ears, one ear at a time.
experiments were conducted under three conditions: i) baseline = auditory stimuli only ii) auditory stimuli + mobile phone on the stimulated ear on iii) auditory stimuli + mobile phone on the stimulated ear off
|Setup||tubal insert phone electrodes inserted into the ear canals of the subjects, three Ag-AgCl-electrodes (1 ground, 2 reference) attached to the forehaed, mobile phone placed directly on the ear; additional auditory stimuli conducted through thin flexible silicon tubes and polyurethane foam eartips wrapped in thin gold foil|
|Sham exposure||A sham exposure was conducted.|
Auditory brainstem response waveforms showed no significant differences due to exposure, suggesting that short-term exposure to mobile phone electromagnetic fields did not affect the transmission of sensory stimuli from the cochlea up to the midbrain along the auditory nerve and brainstem auditory pathways.