It is the subject of this study to investigate the biological effect of the HF radiation produced by the GSM mobile phone on the inner ear with its sensors of the vestibular and auditive systems. The thermographic investigations made on various model materials and on the human temporal bone 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 did not result in vestibular reactions generated by field effects, neither for the pulsed nor for the continuous HF field. Compared with the recording without field, the brainstem electric response audiometry tests under field effect of 24 ears 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 recorded on 20 ears 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. 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.

The complete research report "Biological effect of pulsed and continuous maximum-frequency (microwave) radiation on the inner ear" is also available as pdf-file (in German only).