Study type: Medical/biological study (observational study)

Effects of intensive and moderate cellular phone use on hearing function. med./bio.

Published in: Electromagn Biol Med 2006; 25 (1): 13-21

Aim of study (acc. to author)

To study the effects of irradiation emitted by mobile phones on the hearing function of users.

Background/further details

Three groups were investigated: 1) 20 men who have used a mobile phone frequently and spoken approximately 2 h per day for four years; 2) 20 men who have used a mobile phone for 10-20 minutes per day for four years; and 3) 20 men who have never used a mobile phone (the control group).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Exposure duration: repeated daily exposure, 10-20 min or 2 h/day, for 4 years
  • SAR: 0.82 W/kg maximum (0.6-0.82 W/kg)

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Exposure duration repeated daily exposure, 10-20 min or 2 h/day, for 4 years
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.82 W/kg maximum measured - 0.6-0.82 W/kg

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The brainstem electric response audiometry data showed no differences between the two experimental groups and the control group.
The data of the pure-tone audiometry also revealed no differences between moderate mobile phone users (group 2) and control subjects. However, detection thresholds in those who talked approximately 2 h per day were found to be higher than those in either moderate users or control subjects.
The results show that a higher degree of hearing loss is associated with long-term exposure to electromagnetic field generated by mobile phones.

Study character:

Study funded by

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