It is at least 2 years old but has never been corrected. It says
One primary concern was the effect of TETRA radiation in the 16Hz region. This is a frequency the brain is highly sensitive to, being one of the frequencies at which the brain ticks along at. Exposure to such frequencies can cause fits and epileptic reactions. Guess which frequency TETRA throws out; 17.6Hz.
When did the radio spectrum ever go down to 16Hz?!