[Effects of electromagnetic fields emitted by cellular phone on auditory and vestibular labyrinth].
BACKGROUND
It is the subject of this study to investigate the biological effect of the HF radiation produced by the Global System for Mobile Communications-( GSM)-mobile phone on the inner ear with its sensors of the vestibular and auditive systems.


METHODS
Thermographic investigations made on various model materials and on the human temporal bone should show whether mobile phone does induce any increases of temperature which would lead to a relevant stimulus for the auditive and vestibular system or not. We carried out video-nystagmographic recordings of 13 subjects, brainstem electric response audiometry of 24 ears, and recordings of distorsion products of otoacoustic emissions of 20 ears. All tests were made with and without a mobile phone in use. The data was then analyzed for variation patterns in the functional parameters of the hearing and balance system that are subject to the (non)existence of electromagnetic radiation from the mobile phone.


RESULTS
The thermographic investigations suggest that the mobile phone does not induce any increases of temperature which would lead to a relevant stimulus for the auditive and vestibular system. Video-nystagmographic recordings under field effect do not furnish any indication of vestibular reactions generated by field effects. Compared with the recording without field, the brainstem electric response audiometry under field effect did not reveal any changes of the parameters investigated, i. e. absolute latency of the peaks I, III, V and the interpeak latency between the peaks I and V. The distorsion products of otoacoustic emissions do not indicate, comparing the three measuring situations, i. e. before field effect, pulsed field and continuous field, any possible impacts of the HF field on the spectrum or levels of emissions for none of the probands.


CONCLUSIONS
The investigations made show that the electromagnetic fields generated in using the mobile phone do not have an effect on the inner ear and auditive system to the colliculus inferior in the brainstem and on the vestibular receptors in the inner ear and the vestibular system.
Sievert
U
U
Hals-Nasen-Ohrenklinik Otto Körner der Universität Rostock. uwe.sievert@med.uni-rostock.de
Eggert
S
S
Goltz
S
S
Pau
H W
HW
D000328:Adult; D001299:Audiometry; D040421:Cell Phone; D007758:Ear, Inner / Q000502:physiology* / Q000528:radiation effects*; D004574:Electromagnetic Fields / Q000009:adverse effects; D004584:Electronystagmography / Q000295:instrumentation; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006309:Hearing / Q000502:physiology* / Q000528:radiation effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous / Q000528:radiation effects; D013817:Thermography; D013997:Time Factors; D014722:Vestibule, Labyrinth / Q000502:physiology / Q000528:radiation effects; D014743:Videotape Recording