Study type: Medical/biological study (experimental study)

Effects of mobile phone electromagnetic fields on an auditory order threshold task. med./bio.

Published in: Bioelectromagnetics 2007; 28 (6): 493-496

Aim of study (acc. to author)

To study the effect of acute exposure to radiofrequency electromagnetic fields generated by mobile phones on an auditory threshold task.

Background/further details

The study replicates a previous study (publication 10779) with much larger sample of participants (168 participants).
Subjects had to decide on which side the first of two succeeding auditory stimuli was presented. Inter-stimulus-intervals were gradually reduced as long as no mistakes occured; wrong responses led to expansion of the intervals.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 888 MHz
Modulation type: pulsed
Exposure duration: continuous for 40 min
  • SAR: 1.4 W/kg average over mass (10 g) (±30%)
  • SAR: 11.2 W/kg peak value
Exposure 2: 888 MHz
Modulation type: CW
Exposure duration: continuous for 40 min
  • SAR: 1.4 W/kg average over mass (10 g) (±30%)

General information

Half of the participants were exposed to a CW signal or to a GSM signal, respectively.

Exposure 1

Main characteristics
Frequency 888 MHz
Type
Exposure duration continuous for 40 min
Modulation
Modulation type pulsed
Additional info

GSM signal

Exposure setup
Exposure source
Setup The mobile phone was positioned on the left or right ear for half of the participants, respectively.
Sham exposure A sham exposure was conducted.
Additional info Participants were exposed or sham-exposed in two separate sessions.
Parameters
Measurand Value Type Method Mass Remarks
SAR 1.4 W/kg average over mass measured 10 g ±30%
SAR 11.2 W/kg peak value measured - -

Exposure 2

Main characteristics
Frequency 888 MHz
Type
Exposure duration continuous for 40 min
Modulation
Modulation type CW
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 1.4 W/kg average over mass measured 10 g ±30%

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • after exposure

Main outcome of study (acc. to author)

No significant effect of radiofrequency electromagnetic field exposure was found suggesting that the acute exposure does not affect performance in the order threshold task.

Study character:

Study funded by

Replicated studies

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