USING a hands-free earpiece with a mobile phone may channel more microwave radiation into your head than holding the phone up to your ear, according to tests announced last week by Britain’s Consumers’ Association. But the tests also found there might be a cheap and simple solution.
The CA’s tests found, however, that fitting a small ring of an iron-based compound called ferrite to the headset wire eradicated the extra radiation. “The ferrite choke acts as a high impedance to the wave and reflects it back down the cable,” says Les Barclay, a member of the government’s Independent Expert Group on Mobile Phones.…
