Study type: Medical/biological study (experimental study)

[REM suppression induced by digital mobile radio telephones] med./bio.

REM-Suppression unter dem Einfluß digitaler Funktelefone

Published in: Wien Med Wochenschr 1996; 146 (13-14): 285-286

Aim of study (acc. to author)

To investigate the effects of pulsed high-frequency electromagnetic fields emitted by digital cellular phones on sleep in healthy humans.



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

Exposure 1

Main characteristics
Frequency 900 MHz
Exposure duration continuous for 8 h
Modulation type pulsed
Pulse width 580 µs
Repetition frequency 217 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 40 cm
Setup A cellular phone was installed at the top of the bed at a distance of 40 cm from the vertex of the subject.
Additional info The subjects were exposed in one night and sham-exposed in another night (randomised, single-blind).
Measurand Value Type Method Mass Remarks
power 8 W - - - -
power density 0.05 mW/cm² mean - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Besides a hypnotic effect with shortening of sleep onset latency, a REM sleep suppressive effect with reduction of duration and percentage of REM sleep was found under radiation. Spectral analysis revealed an increased spectral power density of the EEG signal during REM sleep (especially in the alpha band).

Study character:

Study funded by

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