investigated possible interferences
of RF on the cochlear physiology of rats. Distortion
product otoacoustic emissions were recorded in newborn
and adult animals exposed to GSM microwaves at 900 MHz
during one hour each day for 30 days. These animals were
compared to an unexposed control group. No changes in
otoacoustic emissions were found in growing and adult
rats. The authors hypothesized that the compact bone around the cochlea might have shielded it against radiation,
protecting the hair cells from microwaves.