Study type: Medical/biological study (experimental study)

Effects of RF fields emitted from smart phones on cardio-respiratory parameters: a preliminary provocation study. med./bio.

Published in: IEEE 33th Annual International Conference of the Engineering in Medicine and Biology Society (EMBC), 2011. IEEE, 2011: 1961-1964, ISBN 9781457715891

Aim of study (acc. to author)

This study describes an experimental setup for evaluating the physiological effects of radiofrequency fields emitted from WCDMA in humans.

Background/further details

Two groups of ten volunteers with self-reported electromagnetic hypersensitivity (five males/five females) and ten non-electromagnetic hypersensitivity subjects (five males/five females) participated and were sham exposed and exposed on two different days.
Physiological data were recorded for five minutes at four different stages: pre-exposure rest, after 11 minutes of exposure, after 27 minutes of exposure, and 11 minutes after exposure termination.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 1,950 MHz
Exposure duration: continuous for 32 min

Exposure 1

Main characteristics
Frequency 1,950 MHz
Type
Exposure duration continuous for 32 min
Exposure setup
Exposure source
Distance between exposed object and exposure source 3 mm
Setup modules inserted into a dummy phone constructed without metal; dummy phone placed in a headset with earplugs and kept in speaking position next to the test person's left cheek; a piece of wood placed between the phone and the person's cheek for thermal insulation
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 6.9 V/m - - - -
SAR 1.57 W/kg spatial average measured partial body with the module's antenna positioned 67.5 mm from the ear reference point
power 251 mW - - - 24 dBm

Reference articles

  • Croft RJ et al. (2010): Effects of 2G and 3G mobile phones on human alpha rhythms: Resting EEG in adolescents, young adults, and the elderly.
  • Nam KC et al. (2009): Hypersensitivity to RF fields emitted from CDMA cellular phones: a provocation study.
  • Unterlechner M et al. (2008): No effect of an UMTS mobile phone-like electromagnetic field of 1.97 GHz on human attention and reaction time.
  • Haarala C et al. (2007): Pulsed and continuous wave mobile phone exposure over left versus right hemisphere: effects on human cognitive function.
  • Beard BB et al. (2006): Comparisons of computed mobile phone induced SAR in the SAM phantom to that in anatomically correct models of the human head.

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The data showed that WCDMA radiofrequency exposure of 30 minutes did not have any physiological effects in either group.

Study character:

Study funded by

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