Study type: Medical/biological study (experimental study)

Human sleep EEG under the influence of pulsed radio frequency electromagnetic fields. Results from polysomnographies using submaximal high power flux densities. med./bio.

Published in: Neuropsychobiology 2000; 42 (4): 207-212

Aim of study (acc. to author)

To investigate the influence of radiofrequency electromagnetic fields of cellular phone GSM signals on human sleep EEG pattern. In order to evaluate a potential dose-dependent effect (see publication 646), the present investigation was designed using considerably higher power flux densities.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 8 h

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Polarization
  • circular
Exposure duration continuous for 8 h
Modulation
Modulation type pulsed
Pulse width 577 µs
Repetition frequency 217 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 40 cm
Chamber Metal-free cabin of 2.9 x 1.4 x 1.4 m³ the walls of which were lined with RF absorbing material.
Setup The antenna was positioned 40 cm below the pillow of the bed.
Additional info Each subject attended 2 sessions at least 7 days apart. After an adaptation night, polysomnographies were recorded during two consecutive nights. Half of the subjects were exposed to the EMF during the first session, whereas the other half were exposed in the second session. Subjects were blind to exposure conditions.
Parameters
Measurand Value Type Method Mass Remarks
power density 50 W/m² unspecified measured - -
SAR 1.8 W/kg maximum estimated 10 g -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The results revealed no significant effect of the field application either on conventional sleep parameters or on sleep EEG power spectra.

Study character:

Study funded by

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