Study type: Medical/biological study (experimental study)

Effect of chronic exposure to cellular telephone electromagnetic fields on hearing in rats. med./bio.

Published in: J Laryngol Otol 2011; 125 (4): 348-353

Aim of study (acc. to author)

To study the effects of the electromagnetic field emitted by cell phones on the inner ear of rats.

Background/further details

20 adult rats and 20 newborns were divided into two exposure and two control groups (each group n=10).



Exposure Parameters
Exposure 1: 900–1,800 MHz
Exposure duration: continuous for 6 h/day on 30 days

Exposure 1

Main characteristics
Frequency 900–1,800 MHz
Exposure duration continuous for 6 h/day on 30 days
Exposure setup
Exposure source
Measurand Value Type Method Mass Remarks
SAR 0.934 W/kg - - - Samsung SGH-N170 mobile phone
SAR 0.851 W/kg - - - LG KG 275 mobile phone

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

For both the newborn and adult rat groups, there was no significant difference in distortion product otoacoustic emissions recorded before and after exposure. Exposure to the electromagnetic field emitted by mobile phones for 6 hours a day for 30 consecutive days had no effect on the hearing of newborn or adult rats at the outer ear, middle ear or cochlear level.

Study character:

Study funded by

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