Study type: Medical/biological study (experimental study)

Human brain wave activity during exposure to radiofrequency field emissions from mobile phones. med./bio.

Published in: Australas Phys Eng Sci Med 2003; 26 (4): 162-167

Aim of study (acc. to author)

To determine whether there is an effect of mobile phone electromagnetic field emissions (full-power and standby modes) on the human electroencephalography (EEG).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: intermittent for 10 x 5 min, see add. information
transmission mode
Exposure 2: 900 MHz
Modulation type: pulsed
Exposure duration: intermittent for 10 x 5 min, see add. information
standy mode
-

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration intermittent for 10 x 5 min, see add. information
Additional info transmission mode
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Additional info

Discontinuous transmission (DTX) and power control were disabled.

Exposure setup
Exposure source
Distance between exposed object and exposure source 2 cm
Chamber Subjects were sitting relaxed in a back supported chair.
Setup The mobile phone was placed horizontally behind the subject's head with the antenna positioned 2 cm away from the occipital region.
Additional info Ten sessions of 5 min each were made with 50% randomised (single-blind) EMF or sham exposures and breaks of 10-15 min between them.
Parameters
Measurand Value Type Method Mass Remarks
power 250 mW mean - - -
power 2 W peak value - - -

Exposure 2

Main characteristics
Frequency 900 MHz
Type
Exposure duration intermittent for 10 x 5 min, see add. information
Additional info standy mode
Modulation
Modulation type pulsed
Additional info

The phone was in standby mode emitting low frequencies within 1-32 Hz.

Exposure setup
Exposure source
Distance between exposed object and exposure source 2 cm
Additional info Ten sessions of 5 min each were made with 50% randomised (single-blind) EMF or sham exposures and breaks of 10-15 min between them.
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated material:
Investigated organ system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

Statistical analysis indicated significant difference in the full-power mode trial within the EEG alpha (8-13 Hz) and beta (13-32 Hz) bands. A subsequent statistical test of median spectral power in discrete EEG rhythms revealed significant differences in 7 of the 32 distinct frequencies overall. In conclusion, the data lend support to the thesis of EEG effects from mobile phones activated in talk-mode.

Study character:

Study funded by

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