ID Number		1250
Study Type		Human / Provocation
Model		900 MHz (CW, PW) exposure to humans and analysis of heating of the vestibular organ (inner ear)
Details		Human volunteers (n=13) were exposed to 889.6 MHz (CW and PW) at an SAR of ~1.9 W/kg at 18 mm (the depth of the vestibular organ in the head) and assessed for heating in the inner ear based upon nystagmus (involuntary eye movement). RF exposure did not cause nystagmus. The authors concluded that exposure did not increase vestibular temperature more than 0.1 degree C because temperature changes greater than 0.1 degree C cause nystagmus. In related studies, a similar set of volunteers (n = 12) was exposed as above for 3 minutes to 889.6 MHz (either CW or PW) RF from a mobile phone handset while auditory brainstem responses were recorded during a series of clicks at 50, 55, and 60 dB using a stimulus frequency of 15 Hz.The authors reported no short-term effect on auditory evoked responses. In a related study, models of a human head as well as human subjects (n = 13) were exposed to 900 MHz GSM and thermographic images recorded to assess whether significant temperature increases could be detected that might affect or be a stimulus for the auditive or vestibular system. The authors report no temperature increases sufficient to effect auditory systems. Otoacoustic emission recordings also were not affected by GSM RF exposure.
Findings		No Effects
Status		Completed With Publication
Principal Investigator		University of Rockstock, Germany
Funding Agency		Private/Instit.
Country		GERMANY
References		Sievert, U et al. Laryngorhinolotolgie., (2007) 86:264-270 Pau , HW et al. Otolaryngology, (2005) 132:43-49 Sievert, U et al. Otolaryngology, (2005) 132:451-455
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