Effects of UMTS cellular phones on human hearing: results of the European project EMFnEAR.
Abstract The European project EMFnEAR was undertaken to assess potential changes in human auditory function after a short-term exposure to radiofrequency (RF) radiation produced by UMTS (Universal Mobile Telecommunication System) mobile phones. Participants were healthy young adults with no hearing or ear disorders. Auditory function was assessed immediately before and after exposure to radiofrequency radiation, and only the exposed ear was tested. Tests for the assessment of auditory function were hearing threshold level (HTL), distortion product otoacoustic emissions (DPOAE), contralateral suppression of transiently evoked otoacoustic emission (CAS effect on TEOAE), and auditory evoked potentials (AEP). The exposure consisted of speech at a typical conversational level delivered via an earphone to one ear, plus genuine or sham RF-radiation exposure produced by a commercial phone controlled by a personal computer. Results from 134 participants did not show any consistent pattern of effects on the auditory system after a 20-min UMTS exposure at the maximum output of the phone with 69 mW/kg SAR in the cochlea region in a double blind comparison of genuine and sham exposure. An isolated effect on the hearing threshold at high frequencies was identified, but this was statistically nonsignificant after correction for multiple comparisons. It is concluded that UMTS short-term exposure at the maximum output of consumer mobile phones does not cause measurable immediate effects on the human auditory system.
Parazzini
Marta
M
Istituto di Ingegneria Biomedica ISIB, Consiglio Nazionale delle Ricerche, Milan, Italy. marta.parazzini@polimi.it
Sibella
Federica
F
Lutman
Mark E
ME
Mishra
Srikanta
S
Moulin
Annie
A
Sliwinska-Kowalska
Mariola
M
Woznicka
Ewelina
E
Politanski
Piotr
P
Zmyslony
Marek
M
Thuroczy
Gyorgy
G
Molnár
Ferenc
F
Kubinyi
Györgyi
G
Tavartkiladze
George
G
Bronyakin
Stanislav
S
Uloziene
Ingrida
I
Uloza
Virgijlius
V
Gradauskiene
Egle
E
Ravazzani
Paolo
P
D000293:Adolescent; D000328:Adult; D001307:Auditory Perception / Q000502:physiology* / Q000528:radiation effects*; D040421:Cell Phone; D004574:Electromagnetic Fields; D004781:Environmental Exposure; D005060:Europe; D005260:Female; D006309:Hearing / Q000502:physiology* / Q000528:radiation effects*; D006320:Hearing Tests; D006801:Humans; D008297:Male; D011829:Radiation Dosage; D055815:Young Adult