Study type: Medical/biological study (experimental study)

Influence of a radiofrequency electromagnetic field on cardiovascular and hormonal parameters of the autonomic nervous system in healthy individuals. med./bio.

Published in: Radiat Res 2002; 158 (3): 352-356

Aim of study (acc. to author)

To investigate the effects of GSM exposure (900 MHz, pulsed with 217 Hz, 2 W, derived from a mobile phone) on cardiovascular and hormonal parameters in man.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 50 min
  • power: 2 W peak value
  • SAR: 0.84 W/kg average over mass (1 g)
  • SAR: 0.5 W/kg average over mass (10 g)

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for 50 min
Modulation
Modulation type pulsed
Pulse width 0.576 ms
Repetition frequency 217 Hz
Additional info

GSM-like signal

Exposure setup
Exposure source
Chamber The slight buzzing of the phone was covered up by an additional background sound of the same pulse frequency, generated in the laboratory.
Setup The mobile phone was mounted to the right side of the head in a typical use position. It was turned on during the whole investigation and was switched from the EMF to the sham mode by radio control. A 1.5-cm thick layer of foam material was positioned between the phone and the head to prevent any influence of the heat produced by the phone.
Sham exposure A sham exposure was conducted.
Additional info All volunteers underwent a single-blind, placebo-controlled protocol once on each of two different days. Each investigation included two successive 50-min periods of EMF and sham exposure, given in a randomized order and separated by a 15-min interval. On the second measurement day, the order of exposure type for each subject was reversed.
Parameters
Measurand Value Type Method Mass Remarks
power 2 W peak value - - -
SAR 0.84 W/kg average over mass measured 1 g -
SAR 0.5 W/kg average over mass measured 10 g -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

None of the cardiovascular or hormonal parameters was statistically significant altered by GSM exposure.

Study character:

Study funded by

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