Medical/biological study (experimental study)

A study of the effects of cellular telephone microwave radiation on the auditory system in healthy men med./bio.

By: Mora R, Crippa B, Mora F, Dellepiane M

Published in: Ear Nose Throat J 2006; 85 (3): 160, 162-160, 163

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Aim of study (acc. to author)

To study the effects of mobile phone microwave irradiation on the auditory system in 20 healthy men.

Endpoint

auditory system/hearing

Exposure

- microwaves
- mobile communications
- mobile phone
- digital mobile phone
- GSM

Exposure	Parameters
Exposure 1: 900–1,800 MHz Modulation type: pulsed Exposure duration: intermittent, see add. information	-

Exposure 1

Main characteristics

Frequency	900–1,800 MHz
Type	electromagnetic field
Exposure duration	intermittent, see add. information

Modulation

Modulation type	pulsed

Exposure setup

Exposure source	cellular phone GSM
Setup	The phone supported by a metal stand in the normal use position was pressed against the subject's left ear with the aerial extended away from the head.
Additional info	Subjects participated in three exposure sessions, at 1-h intervals, of 15 or 30 min duration: 1) Continuous exposure to "silent energy" for 30 min. No telephone conversation. 2) Intermittent exposure for 30 min. Subjects made 12 telephone conversations of 2 min and 30 s each. 3) Continuous exposure "to the same EMF" for 15 min. The phone was held in contact with the left retroauricular mastoid area rather than the ear.

Parameters

No parameters are specified for this exposure.

Exposed system:

human
partial body: head (left ear and left retroauricular mastoid area)

Methods Endpoint/measurement parameters/methodology

effects on the neurological system: auditory brainstem response (ABR)
transient evoked otoacustic emission (TEOAE)

Investigated system:

investigation on living organism

Investigated organ system:

Time of investigation:

before exposure
during exposure
after exposure

Main outcome of study (acc. to author)

No significant changes in either measurement were found. The authors conclude that the use of mobile phones does not alter the auditory system in the short-term.

Study character:

medical/biological study
experimental study
full/main study

Study funded by

not stated/no funding

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