Medical/biological study (experimental study)

Effects of the acute exposure to the electromagnetic field of mobile phones on human auditory brainstem responses med./bio.

By: Oysu C, Topak M, Celik O, Yilmaz HB, Sahin AA

Published in: Eur Arch Otorhinolaryngol 2005; 262 (10): 839-843

Aim of study (acc. to author)

To explore the in vivo short-term effects of the electromagnetic fields of mobile phones on auditory brainstem responses in human.

Background/further details

18 healthy right-handed adult volunteers participated. Click acoustic stimuli were presented with 60 and 80 dB nHL (=normal hearing level) intensities.

Endpoint

effects on the neurological system: auditory brainstem response

Exposure

- mobile communications
- digital mobile phone

Exposure	Parameters
Exposure 1: 900 MHz Modulation type: pulsed Exposure duration: continuous for 15 min	SAR: 0.82 W/kg maximum

Exposure 1

Main characteristics

Frequency	900 MHz
Type	electromagnetic field
Exposure duration	continuous for 15 min

Modulation

Modulation type	pulsed

Exposure setup

Exposure source	cellular phone
Setup	The mobile phone was positioned in direct contact to the right ear.

Parameters

Measurand	Value	Type	Method	Mass	Remarks
SAR	0.82 W/kg	maximum	calibration	-	-

Exposed system:

human
partial body: ear

Methods Endpoint/measurement parameters/methodology

effects on the neurological system: auditory brainstem response (ABR test, wave and interwave latencies)

Investigated system:

investigation on living organism

Investigated organ system:

brain/CNS
central auditory system

Time of investigation:

before exposure
after exposure

Main outcome of study (acc. to author)

The exposure to electromagnetic field for 15 minutes did not cause significant difference in the latencies of the auditory brainstem response obtained at both 60 and 80 dB nHL stimulus level.
In conclusion, acute short-term exposure at 900 MHz does not alter auditory nerve electrical conduction.

Study character:

medical/biological study
experimental study
full/main study

Study funded by

not stated/no funding

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