Study type: Medical/biological study (experimental study)

No short-term effects of digital mobile radio telephone on the awake human electroencephalogram. med./bio.

Published in: Bioelectromagnetics 1997; 18 (2): 172-176

Aim of study (acc. to author)

To study the influence of digital mobile phone on the awake EEG of healthy subjects under closed-eyes condition.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for nearly 3.5 min

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration continuous for nearly 3.5 min
Modulation
Modulation type pulsed
Pulse width 580 µs
Repetition frequency 217 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 40 cm
Chamber The experimental sessions took place in a sound-proof electrophysiological laboratory.
Setup The mobile phone was positioned at a distance of 40 cm from the vertex of the subject, comparable to normal use, and operated from an adjacent room.
Additional info For each subject the EEG was registered in two 10 min duration periods separated by a 30 min break. Each EEG registration was subdivided into three successive segments, each consisting of 80 sweeps at 2.55 s duration. The first and the third segments served as controls during which the EMF was switched off. EMF was active during the second segment during one registration session and inactive during the other (randomized, single-blind).
Parameters
Measurand Value Type Method Mass Remarks
power 8 W peak value measured - -
power density 0.05 mW/cm² mean measured - at a distance of 40 cm

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

During exposure of nearly 3.5 min to the 900 MHz electromagnetic field, the authors could not detect any difference in the awake EEGs in terms of spectral power density measures.

Study character:

Study funded by

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