Medical/biological study (experimental study)

Thirty minutes mobile phone use has no short-term adverse effects on central auditory pathways med./bio.

By: Arai N, Enomoto H, Okabe S, Yuasa K, Kamimura Y, Ugawa Y

Published in: Clin Neurophysiol 2003; 114 (8): 1390-1394

Aim of study (acc. to author)

To study whether pulsed high-frequency electromagnetic field emitted by a mobile phone for 30 min has short-term adverse effects on the human central auditory system.

Endpoint

human central auditory system

Exposure

- mobile communications
- digital mobile phone

Exposure	Parameters
Exposure 1: 800 MHz Modulation type: pulsed Exposure duration: continuous for 30 min	power: 0.8 W (net forward power)

Exposure 1

Main characteristics

Frequency	800 MHz
Type	electromagnetic field
Exposure duration	continuous for 30 min

Modulation

Modulation type	pulsed
Additional info	Japanese mobile phone system

Exposure setup

Exposure source	cellular phone connected to a mobile phone simulator
Distance between exposed object and exposure source	4 cm
Setup	The handset was oriented in the normal position for use over the right ear and the microphone oriented towards the corner of the mouth. The antenna was located about 4 cm from the head.
Additional info	For all subjects, three experiments were performed that were separated by at least 1 week. The order of three measurements was counterbalanced among the subjects.

Parameters

Measurand	Value	Type	Method	Mass	Remarks
power	0.8 W	-	-	-	net forward power

Exposed system:

human
partial body: right side of the head

Methods Endpoint/measurement parameters/methodology

effects on the neurological system: auditory brainstem response (ABR; see above)
human central auditory system (auditory brainstem response (ABR); ABR recovery function; middle latency response)

Investigated system:

investigation on living organism

Investigated organ system:

Time of investigation:

before exposure
after exposure

Main outcome of study (acc. to author)

None of the 3 measures were affected by exposure to pulsed electromagnetic field emitted by a mobile phone for 30 min. The authors conclude that 30 min mobile phone use has no short-term adverse effects on the human auditory system.

Study character:

medical/biological study
experimental study
full/main study

Study funded by

Association of Radio Industries and Businesses (ARIB), Japan

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